Found 32 papers in cond-mat
Date of feed: Fri, 21 Jul 2023 00:30:00 GMT

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Adaptive Trotterization for time-dependent Hamiltonian quantum dynamics using instantaneous conservation laws. (arXiv:2307.10327v1 [quant-ph])
Hongzheng Zhao, Marin Bukov, Markus Heyl, Roderich Moessner

Digital quantum simulation relies on Trotterization to discretize time evolution into elementary quantum gates. On current quantum processors with notable gate imperfections, there is a critical tradeoff between improved accuracy for finer timesteps, and increased error rate on account of the larger circuit depth. We present an adaptive Trotterization algorithm to cope with time-dependent Hamiltonians, where we propose a concept of instantaneous "conserved" quantities to estimate errors in the time evolution between two (nearby) points in time; these allow us to bound the errors accumulated over the full simulation period. They reduce to standard conservation laws in the case of time-independent Hamiltonians, for which we first developed an adaptive Trotterization scheme. We validate the algorithm for a time-dependent quantum spin chain, demonstrating that it can outperform the conventional Trotter algorithm with a fixed step size at a controlled error.

Spin Space Groups: Full Classification and Applications. (arXiv:2307.10364v1 [cond-mat.mes-hall])
Zhenyu Xiao, Jianzhou Zhao, Yanqi Li, Ryuichi Shindou, Zhi-Da Song

In this work, we exhaust all the spin-space symmetries, which fully characterize collinear, non-collinear, commensurate, and incommensurate spiral magnetism, and investigate enriched features of electronic bands that respect these symmetries. We achieve this by systematically classifying the so-called spin space groups (SSGs) - joint symmetry groups of spatial and spin operations that leave the magnetic structure unchanged. Generally speaking, they are accurate (approximate) symmetries in systems where spin-orbit coupling (SOC) is negligible (finite but weaker than the interested energy scale); but we also show that specific SSGs could remain valid even in the presence of a strong SOC. By representing the SSGs as O($N$) representations, we - for the first time - obtain the complete classifications of 1421, 9542, and 56512 distinct SSGs for collinear ($N=1$), coplanar ($N=2$), and non-coplanar ($N=3$) magnetism, respectively. SSG not only fully characterizes the symmetry of spin d.o.f., but also gives rise to exotic electronic states, which, in general, form projective representations of magnetic space groups (MSGs). Surprisingly, electronic bands in SSGs exhibit features never seen in MSGs, such as nonsymmorphic SSG Brillouin zone (BZ), where SSG operations behave as glide or screw when act on momentum and unconventional spin-momentum locking, which is completely determined by SSG, independent of Hamiltonian details. To apply our theory, we identify the SSG for each of the 1604 published magnetic structures in the MAGNDATA database on the Bilbao Crystallographic Server. Material examples exhibiting aforementioned novel features are discussed with emphasis. We also investigate new types of SSG-protected topological electronic states that are unprecedented in MSGs.

Enumeration and representation of spin space groups. (arXiv:2307.10369v1 [cond-mat.mtrl-sci])
Jun Ren, Xiaobing Chen, Yanzhou Zhu, Yutong Yu, Ao Zhang, Jiayu Li, Caiheng Li, Qihang Liu

Those fundamental properties, such as phase transitions, Weyl fermions and spin excitation, in all magnetic ordered materials was ultimately believed to rely on the symmetry theory of magnetic space groups. Recently, it has come to light that a more comprehensive group, known as the spin space group (SSG), which combines separate spin and spatial operations, is necessary to fully characterize the geometry and physical properties of magnetic ordered materials such as altermagnets. However, the basic theory of SSG has been seldomly developed. In this work, we present a systematic study of the enumeration and the representation theory of SSG. Starting from the 230 crystallographic space groups and finite translational groups with a maximum order of 8, we establish an extensive collection of over 80,000 SSGs under a four-segment nomenclature. We then identify inequivalent SSGs specifically applicable to collinear, coplanar, and noncoplanar magnetic configurations. Moreover, we derive the irreducible co-representations of the little group in momentum space within the SSG framework. Finally, we illustrate the SSGs and band degeneracies resulting from SSG symmetries through several representative material examples, including a well-known altermagnet RuO2, and a spiral magnet CeAuAl3. Our work advances the field of group theory in describing magnetic ordered materials, opening up avenues for deeper comprehension and further exploration of emergent phenomena in magnetic materials.

Enumeration of spin-space groups: Towards a complete description of symmetries of magnetic orders. (arXiv:2307.10371v1 [cond-mat.mtrl-sci])
Yi Jiang, Ziyin Song, Tiannian Zhu, Zhong Fang, Hongming Weng, Zheng-Xin Liu, Jian Yang, Chen Fang

Symmetries of three-dimensional periodic scalar fields are described by 230 space groups (SGs). Symmetries of three-dimensional periodic (pseudo-) vector fields, however, are described by the spin-space groups (SSGs), which were initially used to describe the symmetries of magnetic orders. In SSGs, the real-space and spin degrees of freedom are unlocked in the sense that an operation could have different spacial and spin rotations. SSGs gives a complete symmetry description of magnetic structures, and have natural applications in the band theory of itinerary electrons in magnetically ordered systems with weak spin-orbit coupling.\textit{Altermagnetism}, a concept raised recently that belongs to the symmetry-compensated collinear magnetic orders but has non-relativistic spin splitting, is well described by SSGs. Due to the vast number and complicated group structures, SSGs have not yet been systematically enumerated. In this work, we exhaust SSGs based on the invariant subgroups of SGs, with spin operations constructed from three-dimensional (3D) real representations of the quotient groups for the invariant subgroups. For collinear and coplanar magnetic orders, the spin operations can be reduced into lower dimensional real representations. As the number of SSGs is infinite, we only consider SSGs that describe magnetic unit cells up to 12 times crystal unit cells. We obtain 157,289 non-coplanar, 24,788 coplanar-non-collinear, and 1,421 collinear SSGs. The enumerated SSGs are stored in an online database at \url{} with a user-friendly interface. We also develop an algorithm to identify SSG for realistic materials and find SSGs for 1,626 magnetic materials. Our results serve as a solid starting point for further studies of symmetry and topology in magnetically ordered materials.

Effects of nucleation at a first-order transition between two superconducting phases: Application to CeRh$_2$As$_2$. (arXiv:2307.10374v1 [cond-mat.supr-con])
András L. Szabó, Mark H. Fischer, Manfred Sigrist

Recent experiments observed a phase transition within the superconducting regime of the heavy-fermion system CeRh$_2$As$_2$ when subjected to a $c$-axis magnetic field. This phase transition has been interpreted as a parity switching from even to odd parity as the field is increased, and is believed to be of first order. If correct, this scenario provides a unique opportunity to study the phenomenon of local nucleation around inhomogeneities in a superconducting context. Here, we study such nucleation in the form of sharp domain walls emerging on a background of spatially varying material properties and hence, critical magnetic field. To this end, we construct a spatially inhomogeneous Ginzburg-Landau functional and apply numerical minimization to demonstrate the existence of localized domain wall solutions and study their physical properties. Furthermore, we propose ultrasound attenuation as an experimental bulk probe of domain wall physics in the system. In particular, we predict the appearance of an absorption peak due to domain wall percolation upon tuning the magnetic field across the first-order transition line. We argue that the temperature dependence of this peak could help identify the nature of the phase transition.

Vacancy spectroscopy of non-Abelian Kitaev spin liquids. (arXiv:2307.10376v1 [cond-mat.str-el])
Wen-Han Kao, Natalia B. Perkins, Gábor B. Halász

Spin vacancies in the non-Abelian Kitaev spin liquid are known to harbor Majorana zero modes, potentially enabling topological quantum computing at elevated temperatures. Here, we study the spectroscopic signatures of such Majorana zero modes in a scanning tunneling setup where a non-Abelian Kitaev spin liquid with a finite density of spin vacancies forms a tunneling barrier between a tip and a substrate. Our key result is a well-defined peak close to zero bias voltage in the derivative of the tunneling conductance whose voltage and intensity both increase with the density of vacancies. This ''quasi-zero-voltage peak'' is identified as the closest analog of the zero-voltage peak observed in topological superconductors that additionally reflects the fractionalized nature of spin-liquid-based Majorana zero modes. We further highlight a single-fermion Van Hove singularity at a higher voltage that reveals the energy scale of the emergent Majorana fermions in the Kitaev spin liquid. Our proposed signatures are within reach of current experiments on the candidate material $\alpha$-RuCl$_3$.

Magnetization amplification in the interlayer pairing superconductor 4Hb-TaS$_2$. (arXiv:2307.10389v1 [cond-mat.supr-con])
Chunxiao Liu, Shubhayu Chatterjee, Thomas Scaffidi, Erez Berg, Ehud Altman

A recent experiment on the bulk compound 4Hb-TaS$_2$ reveals an unusual time-reversal symmetry-breaking superconducting state that possesses a magnetic memory not manifest in the normal state. Here we provide one mechanism for this observation by studying the magnetic and electronic properties of 4Hb-TaS$_2$. We discuss the criterion for a small magnetization in the normal state in terms of spin and orbital magnetization. Based on an analysis of lattice symmetry and Fermi surface structure, we propose that 4Hb-TaS$_2$ realizes superconductivity in the interlayer, equal-spin channel with a gap function whose phase winds along the Fermi surface by an integer multiple of $6\pi$. The enhancement of the magnetization in the superconducting state compared to the normal state can be explained if the state with a gap winding of $6\pi$ is realized, accounting for the observed magnetic memory. We discuss how this superconducting state can be probed experimentally by spin-polarized scanning tunneling microscopy.

Low-Thermal-Budget Ferroelectric Field-Effect Transistors Based on CuInP2S6 and InZnO. (arXiv:2307.10473v1 [cond-mat.mes-hall])
Hojoon Ryu, Junzhe Kang, Minseong Park, Byungjoon Bae, Zijing Zhao, Shaloo Rakheja, Kyusang Lee, Wenjuan Zhu

In this paper, we demonstrate low-thermal-budget ferroelectric field-effect transistors (FeFETs) based on two-dimensional ferroelectric CuInP2S6 (CIPS) and oxide semiconductor InZnO (IZO). The CIPS/IZO FeFETs exhibit non-volatile memory windows of ~1 V, low off-state drain currents, and high carrier mobilities. The ferroelectric CIPS layer serves a dual purpose by providing electrostatic doping in IZO and acting as a passivation layer for the IZO channel. We also investigate the CIPS/IZO FeFETs as artificial synaptic devices for neural networks. The CIPS/IZO synapse demonstrates a sizeable dynamic ratio (125) and maintains stable multi-level states. Neural networks based on CIPS/IZO FeFETs achieve an accuracy rate of over 80% in recognizing MNIST handwritten digits. These ferroelectric transistors can be vertically stacked on silicon CMOS with a low thermal budget, offering broad applications in CMOS+X technologies and energy-efficient 3D neural networks.

Photo-excited charge carrier lifetime enhanced by slow cation molecular dynamics in lead iodide perovskite FAPbI$_3$. (arXiv:2307.10520v1 [cond-mat.mtrl-sci])
M. Hiraishi, A. Koda, H. Okabe, R. Kadono, K. A. Dagnall, J. J. Choi, S.-H. Lee

Using muon spin relaxation ($\mu$SR) measurements on formamidinium lead iodide [FAPbI$_3$, where FA denotes HC(NH$_2)_2$] we show that, among the five structurally distinct phases of FAPbI$_3$ exhibited through two different temperature hysteresis, the reorientation motion of FA molecules is quasi-static below $\approx50$ K over the time scale of 10$^{-6}$ s in the low-temperature (LT) hexagonal (Hex-LT, $<160$ K) phase which has relatively longer photo-excited charge carrier lifetime ($\tau_{\rm c}\sim$10$^{-6}$ s). In contrast, a sharp increase in the FA molecular motion was found above $\approx50$ K in the Hex-LT phase, LT-tetragonal phase (Tet-LT, $<140$ K), the high-temperature (HT) hexagonal phase (Hex-HT, 160-380 K), and the HT-tetragonal phase (Tet-HT, 140-280 K) where $\tau_{\rm c}$ decreases with increasing temperature. More interestingly, the reorientation motion is further promoted in the cubic phase at higher temperatures ($>380/280$ K), while $\tau_{\rm c}$ is recovered to comparable or larger than that of the LT phases. These results indicate that there are two factors that determine $\tau_{\rm c}$, one related to the local reorientation of cationic molecules that is not unencumbered by phonons, and the other to the high symmetry of the bulk crystal structure.

Controllable Incremental Algorithm for Entanglement Entropy and Other Observables with Exponential Variance Explosion in Many-Body Systems. (arXiv:2307.10602v1 [cond-mat.str-el])
Yuan Da Liao

Researchers in the field of physical science are continuously searching for universal features in strongly interacting many-body systems. However, these features can often be concealed within highly complex observables, such as entanglement entropy (EE). The non-local nature of these observables makes them challenging to measure experimentally or evaluate numerically. Therefore, it is of utmost importance to develop a reliable and convenient algorithm that can accurately obtain these complex observables. In this paper, with help of quantum Monte Carlo (QMC), we reveal that the statistical variance of EE exponentially explodes with respect to the system size, making the evaluation of EE inaccurate. We further introduce an incremental algorithm based on the framework of QMC to solve this conundrum. The total number of our incremental processes can be quantitatively determined and reasonably adjusted, making it easy to control the precision in practice. We demonstrate the effectiveness and convenience of our incremental algorithm by using it to obtain the highly accurate EE of a 2D Hubbard model as an example. Additionally, our algorithm can be potentially generalized to calculate other numerically statistically unstable observables with exponential variance growth, such as the entanglement spectrum and topological entanglement negativity of correlated boson/spin and fermion systems, as well as other general functions of determinants of Green's functions in interacting fermions. Accurately measuring these complex observables has the potential to inspire the development of physical theories and guide the direction of experiments.

Double exchange, itinerant ferromagnetism and topological Hall effect in moir\'{e} heterobilayer. (arXiv:2307.10613v1 [cond-mat.str-el])
Haichen Jia, Bowen Ma, Rui Leonard Luo, Gang Chen

Motivated by the recent experiments and the wide tunability on the MoTe$_2$/WSe$_2$ moir\'{e} heterobilayer, we consider a physical model to explore the underlying physics for the interplay between the itinerant carriers and the local magnetic moments. In the regime where the MoTe$_2$ is tuned to a triangular lattice Mott insulator and the WSe$_2$ layer is doped with the itinerant holes, we invoke the itinerant ferromagnetism from the double exchange mechanism for the itinerant holes on the WSe$_2$ layer and the local moments on the MoTe$_2$ layer. Together with the antiferromagnetic exchange on the MoTe$_2$ layer, the itinerant ferromagnetism generates the scalar spin chirality distribution in the system. We further point out the presence of spin-assisted hopping in addition to the Kondo coupling between the local spin and the itinerant holes, and demonstrate the topological Hall effect for the itinerant electrons in the presence of the non-collinear spin configurations. This work may improve our understanding of the correlated moir\'{e} systems and inspire further experimental efforts.

Superconductivity in a van der Waals layered quasicrystal. (arXiv:2307.10679v1 [cond-mat.mtrl-sci])
Yuki Tokumoto, Kotaro Hamano, Sunao Nakagawa, Yasushi Kamimura, Shintaro Suzuki, Ryuji Tamura, Keiichi Edagawa

van der Waals (vdW) layered transition-metal chalcogenides are attracting significant attention owing to their fascinating physical properties. This group of materials consists of abundant members with various elements, having a variety of different structures. However, all vdW layered materials studied to date have been limited to crystalline materials, and the physical properties of vdW layered quasicrystals have not yet been reported. Here, we report on the discovery of superconductivity in a vdW layered quasicrystal of Ta1.6Te. The electrical resistivity, magnetic susceptibility, and specific heat of the Ta1.6Te quasicrystal fabricated by reaction sintering, unambiguously validated the occurrence of bulk superconductivity at a transition temperature of ~1 K. This discovery can pioneer new research on assessing the physical properties of vdW layered quasicrystals as well as two-dimensional quasicrystals; moreover, it paves the way toward new frontiers of superconductivity in thermodynamically stable quasicrystals, which has been the predominant challenge facing condensed matter physics since the discovery of quasicrystals almost four decades ago.

Observation of long-range ferromagnetism via anomalous supercurrents in a spin-orbit coupled superconductor. (arXiv:2307.10722v1 [cond-mat.supr-con])
B. K. Xiang, Y. S. Lin, Q. S. He, J. J. Zhu, B. R. Chen, Y. F. Wang, K. Y. Liang, Z. J. Li, H. X. Yao, C. X. Wu, T. Y. Zhou, M. H. Fang, Y. Lu, I. V. Tokatly, F. S. Bergeret, Y. H. Wang

Conventional superconductors naturally disfavor ferromagnetism because the supercurrent-carrying electrons are paired into anti-parallel spin singlets. In superconductors with strong Rashba spin-orbit coupling, impurity magnetic moments induce supercurrents through the spin-galvanic effect. As a result, long-range ferromagnetic interaction among the impurity moments may be mediated through such anomalous supercurrents in a similar fashion as in itinerant ferromagnets. Fe(Se,Te) is such a superconductor with topological surface bands, previously shown to exhibit quantum anomalous vortices around impurity spins. Here, we take advantage of the flux sensitivity of scanning superconducting quantum interference devices to investigate superconducting Fe(Se,Te) in the regime where supercurrents around impurities overlap. We find homogeneous remanent flux patterns after applying a supercurrent through the sample. The patterns are consistent with anomalous edge and bulk supercurrents generated by in-plane magnetization, which occur above a current threshold and follow hysteresis loops reminiscent of those of a ferromagnet. Similar long-range magnetic orders can be generated by Meissner current under a small out-of-plane magnetic field. The magnetization weakens with increasing temperature and disappears after thermal cycling to above superconducting critical temperature; further suggesting superconductivity is central to establishing and maintaining the magnetic order. These observations demonstrate surface anomalous supercurrents as a mediator for ferromagnetism in a spin-orbit coupled superconductor, which may potentially be utilized for low-power cryogenic memory.

Two-Dimensional Platinum Telluride with Ordered Te Vacancy Superlattice for Efficient and Robust Hydrogen Evolution. (arXiv:2307.10759v1 [cond-mat.mtrl-sci])
Xin Xu, Xuechun Wang, Shuming Yu, Guowei Liu, Yaping Ma, Hao Li, Jiangang Yang, Chenhui Wang, Jing Li, Tao Sun, Weifeng Zhang, Kedong Wang, Nan Xu, Fangfei Ming, Ping Cui, Zhenyu Zhang, Xudong Xiao

Defect engineering to activate the basal planes of transition metal dichalcogenides (TMDs) is critical for the development of TMD-based electrocatalysts as the chemical inertness of basal planes restrict their potential applications in hydrogen evolution reaction (HER). Here, we report the synthesis and evaluation of few-layer (7x7)-PtTe2-x with an ordered, well-defined and high-density Te vacancy superlattice. Compared with pristine PtTe2, (2x2)-PtTe2-x and Pt(111), (7x7)-PtTe2-x exhibits superior HER activities in both acidic and alkaline electrolytes due to its rich structures of undercoordinated Pt sites. Furthermore, the (7x7)-PtTe2-x sample features outstanding catalytic stability even compared to the state-of-the-art Pt/C catalyst. Theoretical calculations reveal that the interactions between various undercoordinated Pt sites due to proximity effect can provide superior undercoordinated Pt sites for hydrogen adsorption and water dissociation. This work will enrich the understanding of the relationship between defect structures and electrocatalytic activities and provide a promising route to develop efficient Pt-based TMD electrocatalysts.

Dissipative systems fractionally coupled to a bath. (arXiv:2307.10795v1 [cond-mat.stat-mech])
Audrique Vertessen, Robin C. Verstraten, Cristiane Morais Smith

Quantum diffusion is a major topic in condensed-matter physics, and the Caldeira-Leggett model has been one of the most successful approaches to study this phenomenon. Here, we generalize this model by coupling the bath to the system through a Weyl fractional derivative. The Weyl fractional Langevin equation is then derived without imposing a non-Ohmic macroscopic spectral function for the bath. By investigating the short- and long-time behavior of the mean squared displacement (MSD), we show that this model is able to describe a large variety of anomalous diffusion. Indeed, we find ballistic, sub-ballistic, and super-ballistic behavior for short times, whereas for long times we find saturation, and sub- and super-diffusion.

Magnon Spin Photogalvanic Effect in Collinear Ferromagnets. (arXiv:2307.10882v1 [cond-mat.mes-hall])
YuanDong Wang, Zhen-Gang Zhu, Gang Su

We propose a spin photogalvanic effect of magnons with broken inversion symmetry. The dc spin photocurrent is generated via the Aharonov-Casher effect, which includes the Drude, Berry curvature dipole, shift, injection, and rectification components with distinct quantum geometric origin. Based on a symmetry classification, we uncover that there exist linearly polarized (LP) magnon spin photocurrent responses in the breathing kagome-lattice ferromagnet with Dzyaloshinskii-Moriya interaction, and the circularly polarized (CP) responses due to the symmetry breaking by applying a uniaxial strain. We address that the topological phase transitions can be characterized by the spin photocurrents. This study presents a deeper insight into the nonlinear responses of light-magnon interactions, and suggests a possible way to generate and control the magnon spin current in real materials.

Enhanced photo-excitation and angular-momentum imprint of gray excitons in WSe$_{2}$ monolayers by spin-orbit-coupled vector vortex beams. (arXiv:2307.10916v1 [cond-mat.mes-hall])
Oscar Javier Gomez Sanchez, Guan-Hao Peng, Wei-Hua Li, Ching-Hung Shih, Chao-Hsin Chien, Shun-Jen Cheng

A light beam can be spatially structured in the complex amplitude to possess orbital angular momentum (OAM), which introduces a new degree of freedom alongside the intrinsic spin angular momentum (SAM) associated with circular polarization. Moreover, super-imposing two twisted lights with distinct SAM and OAM produces a vector vortex beam (VVB) in non-separable states where not only complex amplitude but also polarization are spatially structured and entangled with each other. In addition to the non-separability, the SAM and OAM in a VVB are intrinsically coupled by the optical spin-orbit interaction and constitute the profound spin-orbit physics in photonics. In this work, we present a comprehensive theoretical investigation, implemented on the first-principles base, of the intriguing light-matter interaction between VVBs and WSe$_{2}$ monolayers (WSe$_{2}$-MLs), one of the best-known and promising two-dimensional (2D) materials in optoelectronics dictated by excitons, encompassing bright exciton (BX) as well as various dark excitons (DXs). One of the key findings of our study is the substantial enhancement of the photo-excitation of gray excitons (GXs), a type of spin-forbidden dark exciton, in a WSe$_2$-ML through the utilization of a twisted light that possesses a longitudinal field associated with the optical spin-orbit interaction. Our research demonstrates that a spin-orbit-coupled VVB surprisingly allows for the imprinting of the carried optical information onto gray excitons in 2D materials, which is robust against the decoherence mechanisms in materials. This observation suggests a promising method for deciphering the transferred angular momentum from structured lights to excitons.

Cluster charge-density-wave glass in hydrogen-intercalated TiSe$_{2}$. (arXiv:2307.10979v1 [cond-mat.str-el])
Giacomo Prando, Erik Piatti, Dario Daghero, Renato S. Gonnelli, Pietro Carretta

The topotactic intercalation of transition-metal dichalcogenides with atomic or molecular ions acts as an efficient knob to tune the electronic ground state of the host compound. A representative material in this sense is 1$T$-TiSe$_{2}$, where the electric-field-controlled intercalations of lithium or hydrogen trigger superconductivity coexisting with the charge-density wave phase. Here, we use the nuclear magnetic moments of the intercalants in hydrogen-intercalated 1$T$-TiSe$_{2}$ as local probes for nuclear magnetic resonance experiments. We argue that fluctuating mesoscopic-sized domains nucleate already at temperatures higher than the bulk critical temperature to the charge-density wave phase and display cluster-glass-like dynamics in the MHz range tracked by the $^{1}$H nuclear moments. Additionally, we observe a well-defined independent dynamical process at lower temperatures that we associate with the intrinsic properties of the charge-density wave state. In particular, we ascribe the low-temperature phenomenology to the collective phason-like motion of the charge-density wave being hindered by structural defects and chemical impurities and resulting in a localized oscillating motion.

Physical properties of the Hat aperiodic monotile: Graphene-like features, chirality and zero-modes. (arXiv:2307.11054v1 [cond-mat.mes-hall])
Justin Schirmann, Selma Franca, Felix Flicker, Adolfo G. Grushin

The discovery of the Hat, an aperiodic monotile, has revealed novel mathematical aspects of aperiodic tilings. However, the physics of particles propagating in such a setting remains unexplored. In this work we study spectral and transport properties of a tight-binding model defined on the Hat. We find that (i) the spectral function displays striking similarities to that of graphene, including six-fold symmetry and Dirac-like features; (ii) unlike graphene, the monotile spectral function is chiral, differing for its two enantiomers; (iii) the spectrum has a macroscopic number of degenerate states at zero energy; (iv) when the magnetic flux per plaquette ($\phi$) is half of the flux quantum, zero-modes are found localized around the reflected `anti-hats'; and (v) its Hofstadter spectrum is periodic in $\phi$, unlike other quasicrystals. Our work serves as a basis to study wave and electron propagation in possible experimental realizations of the Hat, which we suggest.

Machine learning Majorana nanowire disorder landscape. (arXiv:2307.11068v1 [cond-mat.mes-hall])
Jacob R. Taylor, Jay D. Sau, Sankar Das Sarma

We develop a practical machine learning approach to determine the disorder landscape of Majorana nanowires by using training of the conductance matrix and inverting the conductance data in order to obtain the disorder details in the system. The inversion carried out through machine learning using different disorder parametrizations turns out to be unique in the sense that any input tunnel conductance as a function of chemical potential and Zeeman energy can indeed be inverted to provide the correct disorder landscape. Our work opens up a qualitatively new direction of directly determining the topological invariant and the Majorana wave-function structure corresponding to a transport profile of a device using simulations that quantitatively match the specific conductance profile. In addition, this also opens up the possibility for optimizing Majorana systems by figuring out the (generally unknown) underlying disorder only through the conductance data. An accurate estimate of the applicable spin-orbit coupling in the system can also be obtained within the same scheme.

Topological nodal line in superfluid $^3$He and the Anderson theorem. (arXiv:1908.01645v5 [cond-mat.other] UPDATED)
T. Kamppinen, J. Rysti, M.-M. Volard, G.E. Volovik, V.B. Eltsov

Superconductivity and superfluidity with anisotropic pairing -- such as $d$-wave in cuprates and $p$-wave in superfluid $^3$He -- are strongly suppressed by impurities. Meanwhile, for applications, the robustness of Cooper pairs to disorder is highly desired. Recently, it has been suggested that unconventional systems become robust if the impurity scattering mixes quasiparticle states only within individual subsystems obeying the Anderson theorem that protects conventional superconductivity. Here, we experimentally verify this conjecture by measuring the temperature dependence of the energy gap in the polar phase of superfluid $^3$He. We show that oriented columnar non-magnetic defects do not essentially modify the energy spectrum, which has a Dirac nodal line. Although the scattering is strong, it preserves the momentum along the length of the columns and forms robust subsystems according to the conjecture. This finding may stimulate future experiments on the protection of topological superconductivity against disorder and on the nature of topological fermionic flat bands.

Quantum Criticality Enabled by Intertwined Degrees of Freedom. (arXiv:2101.01087v2 [cond-mat.str-el] UPDATED)
Chia-Chuan Liu, Silke Paschen, Qimiao Si

Strange metals appear in a wide range of correlated materials. Electronic localization-delocalization and the expected loss of quasiparticles characterize beyond-Landau metallic quantum critical points and the associated strange metals. Typical settings involve local spins. Systems that contain entwined degrees of freedom offer new platforms to realize novel forms of quantum criticality. Here, we study the fate of an SU(4) spin-orbital Kondo state in a multipolar Bose-Fermi Kondo model, which provides an effective description of a multipolar Kondo lattice, using a renormalization-group method. We show that at zero temperature a generic trajectory in the model's parameter space contains two quantum critical points, which are associated with the destruction of Kondo entanglement in the orbital and spin channels respectively. Our asymptotically exact results reveal an overall phase diagram, provide the theoretical basis to understand puzzling recent experiments of a multipolar heavy fermion metal, and point to a means of designing new forms of quantum criticality and strange metallicity in a variety of strongly correlated systems.

Topology of rotating stratified fluids with and without background shear flow. (arXiv:2112.04691v2 [physics.flu-dyn] UPDATED)
Ziyan Zhu, Christopher Li, J. B. Marston

Poincar\'e-gravity modes described by the shallow water equations in a rotating frame have non-trivial topology, providing a new perspective on the origin of equatorially trapped Kelvin and Yanai waves. We investigate the topology of rotating shallow water equations and continuously stratified primitive equations in the presence of a background sinusoidal shear flow. The introduction of a background shear flow not only breaks the Hermiticity and homogeneity of the system but also leads to instabilities. We show that singularities in the phase of the Poincar\'e waves of the unforced shallow-water equations and primitive equations persist in the presence of shear. Thus the bulk Poincar\'e bands have non-trivial topology and we expect and confirm the persistence of the equatorial waves in the presence of shear along the equator where the Coriolis parameter $f$ changes sign.

Chiral anomaly and ferroelectric polarization in type-II Weyl semimetal WTe$_{2}$. (arXiv:2112.10266v4 [cond-mat.stat-mech] UPDATED)
Chen-Huan Wu

We systematically investigate the chiral anomaly and ferroelectric polariation in type-II Weyl semimetal WTe$_{2}$ in $T_{d}$ phase. The chiral anomaly can be observed by the measurement of Hall effect which reflect the anisotropic character of the response to the magnetic field applied in different directions. Extremely large magnetoresistance, asymmetry character with respect to magnetic field, and low critical temperature for the Hall resistivity (for metal-insulator phase transition) are observed, where the observations about the $R_{xx}-T$ curve indicate possible electronic structure transition below 40 K. Also, our theoretical calculation and numerical simulation provide a deeper insight to the electrical structure-dependent dynamics of WTe$_{2}$. Base on the two-level approximation verify that the polarization stems from uncompensated out-of-plane interband transition of the electrons, which is base on the calculations of the dipole transition moment (in both the momentum space and frequency domain), and we found that the topological character of type-II Weyl system is closely related to the electronic behaviors (like the carrier compensation) and the excitations near the Weyl cone. Part of the properties of WTe$_{2}$ are also shares shared by the thermoelectric properties with other two-dimensional transition-metal dichalcogenides, like the WSe$_{2}$ and MoTe$_{2}$.

Corrections to the reflectance of multilayer graphene by light emission. (arXiv:2208.01311v3 [cond-mat.mtrl-sci] UPDATED)
Ken-ichi Sasaki, Kenichi Hitachi, Masahiro Kamada, Takamoto Yokosawa, Taisuke Ochi, Tomohiro Matsui

Monolayer graphene absorbs 2.3 percent of the incident visible light. This 'small' absorption has been used to emphasize the visual transparency of graphene, but it in fact means that multilayer graphene absorbs a sizable fraction of incident light, which causes non-negligible fluorescence. In this paper, we formulate the light emission properties of multilayer graphene composed of tens to hundreds of layers using a transfer matrix method and confirm the method's validity experimentally. We could quantitatively explain the measured contrasts of multilayer graphene on SiO$_2$/Si substrates and found sizable corrections, which cannot be classified as incoherent light emissions, to the reflectance of visible light. The new component originates from coherent emission caused by absorption at each graphene layer. Multilayer graphene thus functions as a partial coherent light source of various wavelengths, and it may have surface-emitting laser applications.

Theoretical investigations on Kerr and Faraday rotations in topological multi-Weyl Semimetals. (arXiv:2209.11217v5 [cond-mat.mes-hall] UPDATED)
Supriyo Ghosh, Ambaresh Sahoo, Snehasish Nandy

Motivated by the recent proposal of giant Kerr rotation in WSMs, we investigate the Kerr and Faraday rotations in time-reversal broken multi-Weyl semimetals (mWSMs) in the absence of an external magnetic field. Using the framework of Kubo response theory, we find that both the longitudinal and transverse components of the optical conductivity in mWSMs are modified by the topological charge ($n$). Engendered by the optical Hall conductivity, we show in the thin film limit that, while the giant Kerr rotation and corresponding ellipticity are independent of $n$, the Faraday rotation and its ellipticity angle scale as $n$ and $n^2$, respectively. In contrast, the polarization rotation in semi-infinite mWSMs is dominated by the axion field showing $n$ dependence. In particular, the magnitude of Kerr (Faraday) angle decreases (increases) with increasing $n$ in Faraday geometry, whereas in Voigt geometry, it depicts different $n$-dependencies in different frequency regimes. The obtained results on the behavior of polarization rotations in mWSMs could be used in experiments as a probe to distinguish single, double, and triple WSMs, as well as discriminate the surfaces of mWSMs with and without hosting Fermi arcs.

Different temperature-dependence for the edge and bulk of entanglement Hamiltonian. (arXiv:2210.10062v2 [quant-ph] UPDATED)
Menghan Song, Jiarui Zhao, Zheng Yan, Zi Yang Meng

We propose a physical picture based on the wormhole effect of the path-integral formulation to explain the mechanism of entanglement spectrum (ES), such that, our picture not only explains the topological state with bulk-edge correspondence of the energy spectrum and ES (the Li and Haldane conjecture), but is generically applicable to other systems independent of their topological properties. We point out it is ultimately the relative strength of bulk energy gap (multiplied with inverse temperature $\beta=1/T$) with respect to the edge energy gap that determines the behavior of the low-lying ES of the system. Depending on the circumstances, the ES can resemble the energy spectrum of the virtual edge, but can also represent that of the virtual bulk. We design models both in 1D and 2D to successfully demonstrate the bulk-like low-lying ES at finite temperatures, in addition to the edge-like case conjectured by Li and Haldane at zero temperature. Our results support the generality of viewing the ES as the wormhole effect in the path integral and the different temperature-dependence for the edge and bulk of ES.

Sublattice Interference promotes Pair Density Wave order in Kagome Metals. (arXiv:2211.01388v2 [cond-mat.str-el] UPDATED)
Yi-Ming Wu, Ronny Thomale, S. Raghu

Motivated by the observation of a pair density wave (PDW) in the kagome metal CsV${}_3$Sb${}_5$, we consider the fate of electrons near a p-type van Hove singularity (vHS) in the presence of local repulsive interactions. We study the effect of such interactions on Fermi surface "patches" at the vHS. We show how a feature unique to the Kagome lattice known as sublattice interference crucially affects the form of the interactions among the patches. The renormalization group (RG) flow of such interactions results in a regime where the nearest neighbor interaction $V$ exceed the onsite repulsion $U$. We identify this condition as being favorable for the formation of charge-density-wave (CDW) and PDW orders. In the weak coupling limit, we find a complex CDW order as the leading instability, which breaks time reversal symmetry. Beyond RG, we perform a Hartree-Fock study to a $V$-only model and find the pair-density-wave order indeed sets in at some intermediate coupling.

Thermography of the superfluid transition in a strongly interacting Fermi gas. (arXiv:2212.13752v2 [cond-mat.quant-gas] UPDATED)
Zhenjie Yan, Parth B. Patel, Biswaroop Mukherjee, Chris J. Vale, Richard J. Fletcher, Martin Zwierlein

Heat transport is a fundamental property of all physical systems and can serve as a fingerprint identifying different states of matter. In a normal liquid a hot spot diffuses while in a superfluid heat propagates as a wave called second sound. Despite its importance for understanding quantum materials, direct imaging of heat transport is challenging, and one usually resorts to detecting secondary effects, such as changes in density or pressure. Here we establish thermography of a strongly interacting atomic Fermi gas, a paradigmatic system whose properties relate to strongly correlated electrons, nuclear matter and neutron stars. Just as the color of a glowing metal reveals its temperature, the radiofrequency spectrum of the interacting Fermi gas provides spatially resolved thermometry with sub-nanokelvin resolution. The superfluid phase transition is directly observed as the sudden change from thermal diffusion to second sound propagation, and is accompanied by a peak in the second sound diffusivity. The method yields the full heat and density response of the strongly interacting Fermi gas, and therefore all defining properties of Landau's two-fluid hydrodynamics. Our measurements serve as a benchmark for theories of transport in strongly interacting fermionic matter.

Polymerization in magnetic metamaterials. (arXiv:2302.11353v2 [cond-mat.mes-hall] UPDATED)
Samuel D. Slöetjes, Matías P. Grassi, Vassilios Kapaklis

We numerically study a mesoscopic system consisting of magnetic nanorings in the presence of thermal magnetization fluctuations. We find the formation of dipolar-field-mediated ``bonds" promoting the formation of annuli clusters, where the amount of bonds between two rings varies between zero and two. This system resembles the formation of polymers from artificial atoms, which in our case are the annuli and where the valency of the atom is set by the ring multipolarity. We investigate the thermodynamic properties of the resulting structures, and find a transition associated with the formation of the bonds. In addition, we find that the system has a tendency to form topological structures, with a distinct critical temperature in relation to the one for bond formation.

Antiferromagnetic Bloch line driven by spin current as room-temperature analog of a fluxon in a long Josephson junction. (arXiv:2305.02276v2 [cond-mat.mes-hall] UPDATED)
R.V. Ovcharov, B.A. Ivanov, J. Åkerman, R. S. Khymyn

Antiferromagnets (AFMs) are promising materials for future high-frequency field-free spintronic applications. Self-localized spin structures can enhance their capabilities and introduce new functionalities to AFM-based devices. Here we consider a domain wall (DW), a topological soliton that bridges a connection between two ground states, similar to a Josephson junction (JJ) link between two superconductors. We demonstrate the similarities between DWs in bi-axial AFM with easy-axis primary anisotropy, driven by a spin current, and long Josephson junctions (LJJs). We found that the Bloch line (BL) in DWs resembles the fluxon state of JJs, creating a close analogy between the two systems. We propose a scheme that allows us to create, move, read, and delete such BLs. This transmission line operates at room temperature and can be dynamically reconfigured in contrast to superconductors. Results of a developed model were confirmed by micromagnetic simulations for Cr$_2$O$_3$ and DyFeO$_3$, i.e., correspondingly with weak and strong in-plane anisotropy. Overall, the proposed scheme has significant potential for use in magnetic memory and logic devices.

Synthetic Lagrangian Turbulence by Generative Diffusion Models. (arXiv:2307.08529v1 [physics.flu-dyn] CROSS LISTED)
Tianyi Li, Luca Biferale, Fabio Bonaccorso, Martino Andrea Scarpolini, Michele Buzzicotti

Lagrangian turbulence lies at the core of numerous applied and fundamental problems related to the physics of dispersion and mixing in engineering, bio-fluids, atmosphere, oceans, and astrophysics. Despite exceptional theoretical, numerical, and experimental efforts conducted over the past thirty years, no existing models are capable of faithfully reproducing statistical and topological properties exhibited by particle trajectories in turbulence. We propose a machine learning approach, based on a state-of-the-art Diffusion Model, to generate single-particle trajectories in three-dimensional turbulence at high Reynolds numbers, thereby bypassing the need for direct numerical simulations or experiments to obtain reliable Lagrangian data. Our model demonstrates the ability to quantitatively reproduce all relevant statistical benchmarks over the entire range of time scales, including the presence of fat tails distribution for the velocity increments, anomalous power law, and enhancement of intermittency around the dissipative scale. The model exhibits good generalizability for extreme events, achieving unprecedented intensity and rarity. This paves the way for producing synthetic high-quality datasets for pre-training various downstream applications of Lagrangian turbulence.

Found 9 papers in prb
Date of feed: Fri, 21 Jul 2023 03:17:13 GMT

Search terms: (topolog[a-z]+)|(graphit[a-z]+)|(rhombohedr[a-z]+)|(graphe[a-z]+)|(chalcog[a-z]+)|(landau)|(weyl)|(dirac)|(STM)|(scan[a-z]+ tunne[a-z]+ micr[a-z]+)|(scan[a-z]+ tunne[a-z]+ spectr[a-z]+)|(scan[a-z]+ prob[a-z]+ micr[a-z]+)|(MoS.+\d+|MoS\d+)|(MoSe.+\d+|MoSe\d+)|(MoTe.+\d+|MoTe\d+)|(WS.+\d+|WS\d+)|(WSe.+\d+|WSe\d+)|(WTe.+\d+|WTe\d+)|(Bi\d+Rh\d+I\d+|Bi.+\d+.+Rh.+\d+.+I.+\d+.+)|(BiTeI)|(BiTeBr)|(BiTeCl)|(ZrTe5|ZrTe.+5)|(Pt2HgSe3|Pt.+2HgSe.+3)|(jacuting[a-z]+)

Tensor network approach to the fully frustrated XY model on a kagome lattice with a fractional vortex-antivortex pairing transition
Feng-Feng Song and Guang-Ming Zhang
Author(s): Feng-Feng Song and Guang-Ming Zhang

We have developed a tensor network approach to the two-dimensional fully frustrated classical XY spin model on the kagome lattice, and clarified the nature of the possible phase transitions of various topological excitations. We find that the standard tensor network representation for the partition …

[Phys. Rev. B 108, 014424] Published Thu Jul 20, 2023

Proximitized insulators from disordered superconductors
Moshe Haim, David Dentelski, and Aviad Frydman
Author(s): Moshe Haim, David Dentelski, and Aviad Frydman

We present an experimental study of bilayers of a disordered Ag metal layer close to the metal-insulator transition and an indium-oxide film which is on the insulating side of the superconductor insulator transition. Our results show that superconducting fluctuations within the indium-oxide film, th…

[Phys. Rev. B 108, 014505] Published Thu Jul 20, 2023

Field-induced magnetic structures in the chiral polar antiferromagnet ${\mathrm{Ni}}_{2}{\mathrm{InSbO}}_{6}$
Y. Ihara, R. Hiyoshi, M. Shimohashi, R. Kumar, T. Sasaki, M. Hirata, Y. Araki, Y. Tokunaga, and T. Arima
Author(s): Y. Ihara, R. Hiyoshi, M. Shimohashi, R. Kumar, T. Sasaki, M. Hirata, Y. Araki, Y. Tokunaga, and T. Arima

We have performed $^{115}\mathrm{In}$-NMR spectroscopy for ${\mathrm{Ni}}_{2}{\mathrm{InSbO}}_{6}$ with corundum-related crystal structure to reveal magnetic structures that develop in high magnetic fields. At low fields ${\mathrm{Ni}}_{2}{\mathrm{InSbO}}_{6}$ shows a helical magnetic order with a l…

[Phys. Rev. B 108, 024417] Published Thu Jul 20, 2023

Lateral line profiles in fast-atom diffraction at surfaces
Peng Pan, Carina Kanitz, Maxime Debiossac, Alex Le-Guen, Jaafar Najafi Rad, and Philippe Roncin
Author(s): Peng Pan, Carina Kanitz, Maxime Debiossac, Alex Le-Guen, Jaafar Najafi Rad, and Philippe Roncin

Grazing incidence fast-atom diffraction (GIFAD) uses keV atoms to probe the topmost layer of crystalline surfaces. The atoms are scattered by the potential energy landscape of the surface onto elastic diffraction spots located at the Bragg angles and on the Laue circle. However, atoms transfer a sig…

[Phys. Rev. B 108, 035413] Published Thu Jul 20, 2023

Plasmon-enhanced optical nonlinearity in graphene nanomeshes
F. Karimi, S. Mitra, S. Soleimanikahnoj, and I. Knezevic
Author(s): F. Karimi, S. Mitra, S. Soleimanikahnoj, and I. Knezevic

Using the density-matrix formalism, we show that graphene nanomeshes (GNMs)—graphene sheets patterned with antidots—have large plasmon-enhanced nonlinear optical response. GNMs can be designed to behave as quasi-one-dimensional plasmonic crystals in which plasmons with large propagation lengths are …

[Phys. Rev. B 108, 035414] Published Thu Jul 20, 2023

Emergence of interface states in graphene/transition metal dichalcogenide heterostructures with lateral interface
Zahra Khatibi and Stephen R. Power
Author(s): Zahra Khatibi and Stephen R. Power

The relative strength of different proximity spin-orbit couplings in graphene on transition metal dichalcogenides (TMDCs) can be tuned via the metal composition in the TMDC layer. While ${\mathrm{Gr}/\mathrm{MoSe}}_{2}$ has a normal gap, proximity to ${\mathrm{WSe}}_{2}$ instead leads to valley-Zeem…

[Phys. Rev. B 108, 035415] Published Thu Jul 20, 2023

Obstructions to gapped phases from noninvertible symmetries
Anuj Apte, Clay Córdova, and Ho Tat Lam
Author(s): Anuj Apte, Clay Córdova, and Ho Tat Lam

Our understanding of quantum symmetry of systems has considerably broadened over the last decade. The idea of symmetry has become intrinsically linked with topology described and algebraically characterized by higher categories. Studying three-dimensional systems with noninvertible symmetries, the authors show here that these symmetries are in general incompatible with a unique gapped ground state. Their results extend the ideas behind the Lieb-Shultz-Mattis theorem to the arena of higher-dimensional field theories invariant under a novel class of symmetries.

[Phys. Rev. B 108, 045134] Published Thu Jul 20, 2023

Supercurrent-induced anomalous thermal Hall effect as a new probe to superconducting gap anisotropy
Xiaodong Hu, Jung Hoon Han, and Ying Ran
Author(s): Xiaodong Hu, Jung Hoon Han, and Ying Ran

Two-dimensional superconductors have been realized in various atomically thin films such as the twisted bilayer graphene, some of which are anticipated to involve an unconventional pairing mechanism. Due to their low dimensionality, experimental probes of the exact nature of superconductivity in the…

[Phys. Rev. B 108, L041106] Published Thu Jul 20, 2023

Strain control of exciton and trion spin-valley dynamics in monolayer transition metal dichalcogenides
Z. An, P. Soubelet, Y. Zhumagulov, M. Zopf, A. Delhomme, C. Qian, P. E. Faria Junior, J. Fabian, X. Cao, J. Yang, A. V. Stier, F. Ding, and J. J. Finley
Author(s): Z. An, P. Soubelet, Y. Zhumagulov, M. Zopf, A. Delhomme, C. Qian, P. E. Faria Junior, J. Fabian, X. Cao, J. Yang, A. V. Stier, F. Ding, and J. J. Finley

The spin-valley physics of monolayer transition metal dichalcogenides (TMDs) remains one of the main interests in the class of van der Waals materials. At low temperature, it is mainly driven by the electron-hole exchange interaction (EHEI) that describes the annihilation of an exciton in one valley and the creation of an exciton in the time-reversal equivalent valley. Here, the authors show that the EHEI in monolayer TMDs is biaxial strain dependent and, surprisingly, it is an order of magnitude more strain dependent than expected from these first principles calculations. This points to a valley scattering channel that has not been considered in the literature so far.

[Phys. Rev. B 108, L041404] Published Thu Jul 20, 2023

Found 1 papers in prl
Date of feed: Fri, 21 Jul 2023 03:17:11 GMT

Search terms: (topolog[a-z]+)|(graphit[a-z]+)|(rhombohedr[a-z]+)|(graphe[a-z]+)|(chalcog[a-z]+)|(landau)|(weyl)|(dirac)|(STM)|(scan[a-z]+ tunne[a-z]+ micr[a-z]+)|(scan[a-z]+ tunne[a-z]+ spectr[a-z]+)|(scan[a-z]+ prob[a-z]+ micr[a-z]+)|(MoS.+\d+|MoS\d+)|(MoSe.+\d+|MoSe\d+)|(MoTe.+\d+|MoTe\d+)|(WS.+\d+|WS\d+)|(WSe.+\d+|WSe\d+)|(WTe.+\d+|WTe\d+)|(Bi\d+Rh\d+I\d+|Bi.+\d+.+Rh.+\d+.+I.+\d+.+)|(BiTeI)|(BiTeBr)|(BiTeCl)|(ZrTe5|ZrTe.+5)|(Pt2HgSe3|Pt.+2HgSe.+3)|(jacuting[a-z]+)

Dynamical Degeneracy Splitting and Directional Invisibility in Non-Hermitian Systems
Kai Zhang, Chen Fang, and Zhesen Yang
Author(s): Kai Zhang, Chen Fang, and Zhesen Yang

In this Letter, we introduce the concept of dynamical degeneracy splitting to describe the anisotropic decay behaviors in non-Hermitian systems. We demonstrate that systems with dynamical degeneracy splitting exhibit two distinctive features: (i) the system shows frequency-resolved non-Hermitian ski…

[Phys. Rev. Lett. 131, 036402] Published Thu Jul 20, 2023

Found 2 papers in pr_res
Date of feed: Fri, 21 Jul 2023 03:17:13 GMT

Search terms: (topolog[a-z]+)|(graphit[a-z]+)|(rhombohedr[a-z]+)|(graphe[a-z]+)|(chalcog[a-z]+)|(landau)|(weyl)|(dirac)|(STM)|(scan[a-z]+ tunne[a-z]+ micr[a-z]+)|(scan[a-z]+ tunne[a-z]+ spectr[a-z]+)|(scan[a-z]+ prob[a-z]+ micr[a-z]+)|(MoS.+\d+|MoS\d+)|(MoSe.+\d+|MoSe\d+)|(MoTe.+\d+|MoTe\d+)|(WS.+\d+|WS\d+)|(WSe.+\d+|WSe\d+)|(WTe.+\d+|WTe\d+)|(Bi\d+Rh\d+I\d+|Bi.+\d+.+Rh.+\d+.+I.+\d+.+)|(BiTeI)|(BiTeBr)|(BiTeCl)|(ZrTe5|ZrTe.+5)|(Pt2HgSe3|Pt.+2HgSe.+3)|(jacuting[a-z]+)

Key observable for linear thermalization
Yuuya Chiba and Akira Shimizu
Author(s): Yuuya Chiba and Akira Shimizu

For studies on thermalization of an isolated quantum many-body system, the fundamental issue is to determine whether a given system thermalizes or not. However, most studies tested only a small number of observables, and it was unclear whether other observables thermalize. Here, we study whether “li…

[Phys. Rev. Research 5, 033037] Published Thu Jul 20, 2023

Stabilization mechanism for many-body localization in two dimensions
D. C. W. Foo, N. Swain, P. Sengupta, G. Lemarié, and S. Adam
Author(s): D. C. W. Foo, N. Swain, P. Sengupta, G. Lemarié, and S. Adam

The addition of a confining potential allows a noninteracting disordered system to have superexponentially (Gaussian) localized wave functions and an interacting disordered system to undergo a localization transition. Gaussian localization shifts the quantum avalanche critical dimension from d = 1 to d = 2, allowing the MBL phase to exist in low-dimensional systems.

[Phys. Rev. Research 5, L032011] Published Thu Jul 20, 2023

Found 1 papers in acs-nano
Date of feed: Thu, 20 Jul 2023 13:07:52 GMT

Search terms: (topolog[a-z]+)|(graphit[a-z]+)|(rhombohedr[a-z]+)|(graphe[a-z]+)|(chalcog[a-z]+)|(landau)|(weyl)|(dirac)|(STM)|(scan[a-z]+ tunne[a-z]+ micr[a-z]+)|(scan[a-z]+ tunne[a-z]+ spectr[a-z]+)|(scan[a-z]+ prob[a-z]+ micr[a-z]+)|(MoS.+\d+|MoS\d+)|(MoSe.+\d+|MoSe\d+)|(MoTe.+\d+|MoTe\d+)|(WS.+\d+|WS\d+)|(WSe.+\d+|WSe\d+)|(WTe.+\d+|WTe\d+)|(Bi\d+Rh\d+I\d+|Bi.+\d+.+Rh.+\d+.+I.+\d+.+)|(BiTeI)|(BiTeBr)|(BiTeCl)|(ZrTe5|ZrTe.+5)|(Pt2HgSe3|Pt.+2HgSe.+3)|(jacuting[a-z]+)

[ASAP] Graphene Sensor Arrays for Rapid and Accurate Detection of Pancreatic Cancer Exosomes in Patients’ Blood Plasma Samples
Tianyi Yin, Lizhou Xu, Bruno Gil, Nabeel Merali, Maria S. Sokolikova, David C. A. Gaboriau, Daniel S. K. Liu, Ahmad Nizamuddin Muhammad Mustafa, Sarah Alodan, Michael Chen, Oihana Txoperena, María Arrastua, Juan Manuel Gomez, Nerea Ontoso, Marta Elicegui, Elias Torres, Danyang Li, Cecilia Mattevi, Adam E. Frampton, Long R. Jiao, Sami Ramadan, and Norbert Klein

TOC Graphic

ACS Nano
DOI: 10.1021/acsnano.3c01812

Found 1 papers in nat-comm

Search terms: (topolog[a-z]+)|(graphit[a-z]+)|(rhombohedr[a-z]+)|(graphe[a-z]+)|(chalcog[a-z]+)|(landau)|(weyl)|(dirac)|(STM)|(scan[a-z]+ tunne[a-z]+ micr[a-z]+)|(scan[a-z]+ tunne[a-z]+ spectr[a-z]+)|(scan[a-z]+ prob[a-z]+ micr[a-z]+)|(MoS.+\d+|MoS\d+)|(MoSe.+\d+|MoSe\d+)|(MoTe.+\d+|MoTe\d+)|(WS.+\d+|WS\d+)|(WSe.+\d+|WSe\d+)|(WTe.+\d+|WTe\d+)|(Bi\d+Rh\d+I\d+|Bi.+\d+.+Rh.+\d+.+I.+\d+.+)|(BiTeI)|(BiTeBr)|(BiTeCl)|(ZrTe5|ZrTe.+5)|(Pt2HgSe3|Pt.+2HgSe.+3)|(jacuting[a-z]+)

Imaging the electron charge density in monolayer MoS2 at the Ångstrom scale
< author missing >

Found 1 papers in scipost

Search terms: (topolog[a-z]+)|(graphit[a-z]+)|(rhombohedr[a-z]+)|(graphe[a-z]+)|(chalcog[a-z]+)|(landau)|(weyl)|(dirac)|(STM)|(scan[a-z]+ tunne[a-z]+ micr[a-z]+)|(scan[a-z]+ tunne[a-z]+ spectr[a-z]+)|(scan[a-z]+ prob[a-z]+ micr[a-z]+)|(MoS.+\d+|MoS\d+)|(MoSe.+\d+|MoSe\d+)|(MoTe.+\d+|MoTe\d+)|(WS.+\d+|WS\d+)|(WSe.+\d+|WSe\d+)|(WTe.+\d+|WTe\d+)|(Bi\d+Rh\d+I\d+|Bi.+\d+.+Rh.+\d+.+I.+\d+.+)|(BiTeI)|(BiTeBr)|(BiTeCl)|(ZrTe5|ZrTe.+5)|(Pt2HgSe3|Pt.+2HgSe.+3)|(jacuting[a-z]+)

Theoretical investigations on Kerr and Faraday rotations in topological multi-Weyl Semimetals, by Supriyo Ghosh, Ambaresh Sahoo, Snehasish Nandy
< author missing >
Submitted on 2023-07-21, refereeing deadline 2023-08-26.