Found 26 papers in cond-mat

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]+)|(flatband)|(flat.{1}band)|(LK.{1}99)

Anomaly inflow, dualities, and quantum simulation of abelian lattice gauge theories induced by measurements
Takuya Okuda, Aswin Parayil Mana, Hiroki Sukeno
arXiv:2402.08720v1 Announce Type: new Abstract: A previous work demonstrated that quantum simulation of abelian lattice gauge theories (Wegner models including the toric code in a limit) in general dimensions can be achieved by local adaptive measurements on symmetry-protected topological (SPT) states with higher-form generalized global symmetries. The entanglement structure of the resource SPT state reflects the geometric structure of the gauge theory. In this work, we explicitly demonstrate the anomaly inflow mechanism between the deconfining phase of the simulated gauge theory on the boundary and the SPT state in the bulk, by showing that the anomalous gauge variation of the boundary state obtained by bulk measurement matches that of the bulk theory. Moreover, we construct the resource state and the measurement pattern for the measurement-based quantum simulation of a lattice gauge theory with a matter field (Fradkin-Shenker model), where a simple scheme to protect gauge invariance of the simulated state against errors is proposed. We further consider taking an overlap between the wave function of the resource state for lattice gauge theories and that of a parameterized product state, and we derive precise dualities between partition functions with insertion of defects corresponding to gauging higher-form global symmetries, as well as measurement-induced phases where states induced by a partial overlap possess different (symmetry-protected) topological orders. Measurement-assisted operators to dualize quantum Hamiltonians of lattice gauge theories and their non-invertibility are also presented.

Thermodynamics of the dipole-octupole pyrochlore magnet Ce$_2$Hf$_2$O$_{7}$ in applied magnetic fields
Anish Bhardwaj, Victor Por\'ee, Han Yan, Nicolas Gauthier, Elsa Lhotel, Sylvain Petit, Jeffrey A. Quilliam, Andriy H. Nevidomskyy, Romain Sibille, Hitesh J. Changlani
arXiv:2402.08723v1 Announce Type: new Abstract: The recently discovered dipole-octupole pyrochlore magnet Ce$_2$Hf$_2$O$_7$ is a promising three-dimensional quantum spin liquid candidate which shows no signs of ordering at low temperature. The low energy effective pseudospin-1/2 description in a magnetic field is characterized by the XYZ Hamiltonian and a Zeeman term where the dipolar local z-component of the pseudospin couples to the local z-component of the applied magnetic field, while the local x- and y-components of the pseudospin remain decoupled as a consequence of their octupolar character. Using effective parameters determined in V. Poree et al., arXiv:2305.08261 (2023), remarkable experimental features can be reproduced, as for instance the specific heat and magnetization data as well as the continuum of states seen in neutron scattering. Here we investigate the thermodynamic response to magnetic fields applied along the global [110] direction using specific heat measurements and fits using numerical methods, and solve the corresponding magnetic structure using neutron diffraction. Specific heat data in moderate fields are reproduced well, however, at high fields the agreement is not satisfactory. We especially observe a two-step release of entropy, a finding that demands a review of both theory and experiment. We address it within the framework of three possible scenarios, including an analysis of the crystal field Hamiltonian not restricted to the two-dimensional single-ion doublet subspace. We conclusively rule out two of these scenarios and find qualitative agreement with a simple model of field misalignment with respect to the crystalline direction. We discuss the implications of our findings for [111] applied fields and for future experiments on Ce$_2$Hf$_2$O$_7$ and its sister compounds.

Universal low-temperature fluctuation of unconventional superconductors revealed: 'Smoking gun' leaves proper bosonic superfluidity the last theory standing
Anthony Hegg, Ruoshi Jiang, Jie Wang, Jinning Hou, Yucel Yildirim, Wei Ku
arXiv:2402.08730v1 Announce Type: new Abstract: Low-temperature thermal fluctuations offer an essential window in characterizing the true nature of a quantum state of matter, a quintessential example being Fermi liquid theory. In the long-standing pursuit toward a fundamental understanding of unconventional superconductivity, the most essential low-temperature thermal fluctuation of superfluidity has unfortunately been greatly overlooked. Here, we examine the leading thermal fluctuation of the superfluid density across numerous families ranging from relatively conventional to highly unconventional superconductors (MgB$_2$, bismuthates, doped buckyballs, heavy fermions, Chevrel clusters, intermetallics, $\kappa$-organics, transition metal dichalcogenides, ruthenates, iron-pnictides, cuprates, and kagome metals). Amazingly, in all of them an unprecedented universal $T^3$ depletion materializes in the low-temperature superfluid density, even in the believed-to-be-conventional MgB$_2$. This reveals a new quantum superfluid state of matter and requires a necessary change of paradigm in describing modern superconductors. We demonstrate that such unorthodox yet generic behavior can be described by an proper particle-conserving theory of bosonic superfluidity hosting a long-lived `true condensate'.

Magneto-optical Hall response in generic Weyl semimetals
Marcus St{\aa}lhammar
arXiv:2402.08735v1 Announce Type: new Abstract: Weyl semimetals are predicted to host signature magneto-optical properties sourced by their peculiar Landau level structure, including the chiral level. Analytical studies are often leaving out the Hall component of the conductivity due to its complicated nature, and even though the chiral anomaly requires Weyl nodes to come in charge-conjugate pairs, toy-models hosting only one node are considered almost exclusively; numerical studies including several Weyl nodes are on the other hand often limited to high-field quantum limits or DC studies. Here, I present a twofold purpose study, where I a) analytically derive a closed-form expression also for the Hall conductivity of a generic Weyl semimetal using linear response theory, and b) apply this general framework to evaluate the transverse conductivity components for Weyl systems with two nodes. I study how various model parameters, including the tilt, momentum separation, and energy location of the nodes, as well as the chemical potential affect the magneto-optical conductivity, and complement these studies with deriving an analytical expression for the DC Hall conductivity, which is also evaluated in various systems. Including a chiral pair of nodes result two important differences compared to earlier studies; the contribution from the chiral level is equal in size but opposite at the two nodes, making the net contribution to disappear; the energy scales at which intraband transitions occur is smeared out and approaches that of interband transitions, strengthening the hypothesis that intraband transitions mask signature optical features in materials. This general formalism can be applied for a large family of generic Weyl semimetals, and comprise an important piece towards unravelling the source of the mismatch between theoretical predictions and experimental observations in candidate materials.

Machine Learning, Density Functional Theory, and Experiments to Understand the Photocatalytic Reduction of CO$_2$ by CuPt/TiO$_2$
Vaidish Sumaria, Takat B. Rawal, Young Feng Li, David Sommer, Jake Vikoren, Robert J. Bondi, Matthias Rupp, Amrit Prasad, Deeptanshu Prasad
arXiv:2402.08884v1 Announce Type: new Abstract: The photoconversion of CO$_2$ to hydrocarbons is a sustainable route to its transformation into value-added compounds and, thereby, crucial to mitigating the energy and climate crises. CuPt nanoparticles on TiO$_2$ surfaces have been reported to show promising photoconversion efficiency. For further progress, a mechanistic understanding of the catalytic properties of these CuPt/TiO$_2$ systems is vital. Here, we employ \textit{ab-initio} calculations, machine learning, and photocatalysis experiments to explore their configurational space and examine their reactivity and find that the interface plays a key role in stabilizing *CO$_2$, *CO, and other CH-containing intermediates, facilitating higher activity and selectivity for methane. A bias-corrected machine-learning interatomic potential trained on density functional theory data enables efficient exploration of the potential energy surfaces of numerous CO$_2$@CuPt/TiO$_2$ configurations via basin-hopping Monte Carlo simulations, greatly accelerating the study of these photocatalyst systems. Our simulations show that CO$_2$ preferentially adsorbs at the interface, with C atom bonded to a Pt site and one O atom occupying an O-vacancy site. The interface also promotes the formation of *CH and *CH$_2$ intermediates. For confirmation, we synthesize CuPt/TiO$_2$ samples with a variety of compositions and analyze their morphologies and compositions using scanning electron microscopy and energy-dispersive X-ray spectroscopy, and measure their photocatalytic activity. Our computational and experimental findings qualitatively agree and highlight the importance of interface design for selective conversion of CO$_2$ to hydrocarbons.

High-resolution spectroscopy of proximity superconductivity in finite-size quantized surface states
Lucas Schneider, Christian von Bredow, Howon Kim, Khai That Ton, Torben H\"anke, Jens Wiebe, Roland Wiesendanger
arXiv:2402.08895v1 Announce Type: new Abstract: Adding superconducting (SC) electron pairing via the proximity effect to pristinely non-superconducting materials can lead to a variety of interesting physical phenomena. Particular interest has recently focused on inducing SC into two-dimensional surface states (SSs), potentially also combined with non-trivial topology. We study the mechanism of proximity-induced SC into the Shockley-type SSs of the noble metals Ag(111) and Cu(111) grown on the elemental SC Nb(110) using scanning tunneling spectroscopy. The tunneling spectra exhibit an intriguing multitude of sharp states at low energies. Their appearance can be explained by Andreev bound states (ABS) formed by the weakly proximitized SSs subject to lateral finite-size confinement. We study systematically how the proximity gap in the bulk states of both Ag(111) and Cu(111) persists up to island thicknesses of several times the bulk coherence length of Nb. We find that even for thick islands, the SSs acquire a gap, with the gap size for Cu being consistently larger than for Ag. Based on this, we argue that the SC in the SS is not provided through direct overlap of the SS wavefunction with the SC host but can be understood to be mediated by step edges inducing electronic coupling to the bulk. Our work provides important input for the microscopic understanding of induced superconductivity in heterostructures and its spectral manifestation. Moreover, it lays the foundation for more complex SC heterostructures based on noble metals.

Structure and magnetic properties of a La$_{0.75}$Sr$_{0.25}$Cr$_{0.90}$O$_{3-\delta}$ single crystal
Kaitong Sun, Yinghao Zhu, S. Yano, Qian Zhao, Muqing Su, Guanping Xu, Ruifeng Zheng, Ying Ellie Fu, Hai-Feng Li
arXiv:2402.08940v1 Announce Type: new Abstract: We have successfully grown large and good-quality single crystals of the La$_{0.75}$Sr$_{0.25}$Cr$_{0.90}$O$_{3-\delta}$ compound using the floating-zone method with laser diodes. We investigated the crystal quality, crystallography, chemical composition, magnetic properties and the oxidation state of Cr in the grown single crystals by employing a combination of techniques, including X-ray Laue and powder diffraction, scanning electron microscopy, magnetization measurements, X-ray photoelectron spectroscopy and light absorption. The La$_{0.75}$Sr$_{0.25}$Cr$_{0.90}$O$_{3-\delta}$ single crystal exhibits a single-phase composition, crystallizing in a trigonal structure with the space group $R\bar{3}c$ at room temperature. The chemical composition was determined as La$_{0.75}$Sr$_{0.25}$Cr$_{0.90}$O$_{3-\delta}$, indicating a significant chromium deficiency. Upon warming, we observed five distinctive characteristic temperatures, namely $T_1 =$ 21.50(1) K, $T_2 =$ 34.98(1) K, $T_3 =$ 117.94(1) K, $T_4 =$ 155.01(1) K, and $T_{\textrm{N}} =$ 271.80(1) K, revealing five distinct magnetic anomalies. Our magnetization study allows us to explore the nature of these anomalies. Remarkably, the oxidation state of chromium in the single-crystal La$_{0.75}$Sr$_{0.25}$Cr$_{0.90}$O$_{3-\delta}$, characterized by a band gap of 1.630(8) eV, is exclusively attributed to Cr$^{3+}$ ions, making a departure from the findings of previous studies on polycrystalline materials.

Giant asymmetric proximity-induced spin-orbit coupling in twisted graphene/SnTe heterostructure
Marko Milivojevi\'c, Martin Gmitra, Marcin Kurpas, Ivan \v{S}tich, Jaroslav Fabian
arXiv:2402.09045v1 Announce Type: new Abstract: We analyze the spin-orbit coupling effects in a three-degree twisted bilayer heterostructure made of graphene and an in-plane ferroelectric SnTe, with the goal of transferring the spin-orbit coupling from SnTe to graphene, via the proximity effect. Our results indicate that the point-symmetry breaking due to the incompatible mutual symmetry of the twisted monolayers and a strong hybridization has a massive impact on the spin splitting in graphene close to the Dirac point, with the spin splitting values greater than 20 meV. The band structure and spin expectation values of graphene close to the Dirac point can be described using a symmetry-free model, triggering different types of interaction with respect to the threefold symmetric graphene/transition-metal dichalcogenide heterostructure. We show that the strong hybridization of the Dirac cone's right movers with the SnTe band gives rise to a large asymmetric spin splitting in the momentum space. Furthermore, we discover that the ferroelectricity-induced Rashba spin-orbit coupling in graphene is the dominant contribution to the overall Rashba field, with the effective in-plane electric field that is almost aligned with the (in-plane) ferroelectricity direction of the SnTe monolayer. We also predict an anisotropy of the in-plane spin relaxation rates. Our results demonstrate that the group-IV monochalcogenides MX (M=Sn, Ge; X=S, Se, Te) are a viable alternative to transition-metal dichalcogenides for inducing strong spin-orbit coupling in graphene.

Quantum Theory of Phonon Induced Anomalous Hall Effect in 2D Massive Dirac metals
Jia-Xing Zhang, Wei Chen
arXiv:2402.09049v1 Announce Type: new Abstract: The phonon induced anomalous Hall or thermal Hall effects have been observed in various systems in recent experiments. However, the theoretical studies on this subject are very scarce and incomplete. In this work, we present a systematic quantum field theory study on the phonon induced anomalous Hall effect, including both the side jump and skew scattering contributions, in a 2D massive Dirac metal, which is considered as the minimum anomalous Hall system. We reveal significant difference from the anomalous Hall effect induced by the widely studied Gaussian disorder which is known to be insensitive to temperature. While the anomalous Hall effect induced by phonon approaches that by Gaussian disorder at high temperature, it behaves very differently at low temperature. Our work provides a microscopic and quantitative description of the crossover from the low to high temperature regime of the phonon induced anomalous Hall conductivity, which may be observed in 2D Dirac metals with breaking time reversal symmetry.

Theory of biexciton-polaritons in transition metal dichalcogenide monolayers
Andrey Kudlis, Ivan A. Aleksandrov, Mikhail M. Glazov, Ivan A. Shelykh
arXiv:2402.09110v1 Announce Type: new Abstract: We theoretically investigate a nonlinear optical response of a planar microcavity with an embedded transition metal dicalcogenide monolayer of a when an energy of a biexcitonic transition is brought in resonance with an energy of a cavity mode. We demonstrate that the emission spectrum of this system strongly depends on an external pump. For small and moderate pumps we reveal the presence of a doublet in the emission with the corresponding Rabi splitting scaling as a square root of the number of the excitations in the system. Further increase of the pump leads to the reshaping of the spectrum, which demonstrates the pattern typical for a Mollow triplet. An intermediate pumping regime shows a broad irregular spectrum reminiscent of a chaotic dynamics of the system.

Manipulation of magnetic anisotropy of 2D magnetized graphene by ferroelectric In$_2$Se$_3$
Rui-Qi Wang, Tian-Min Lei, Yue-Wen Fang
arXiv:2402.09153v1 Announce Type: new Abstract: The capacity to externally manipulate magnetic properties is highly desired from both fundamental and technological perspectives, particularly in the development of magnetoelectronics and spintronics devices. Here, using first-principles calculations, we have demonstrated the ability of controlling the magnetism of magnetized graphene monolayers by interfacing them with a two-dimensional ferroelectric material. When the 3$d$ transition metal (TM) is adsorbed on the graphene monolayer, its magnetization easy axis can be flipped from in-plane to out-of-plane by the ferroelectric polarization reversal of In$_2$Se$_3$, and the magnetocrystalline anisotropy energy (MAE) can be high to -0.692 meV/atom when adopting the Fe atom at bridge site with downward polarization. This may be a universal method since the 3$d$ TM-adsorbed graphene has a very small MAE, which can be easily manipulated by the ferroelectric polarization. As a result, the inherent mechanism is analyzed by second variation method.

Coexistence of Superconductivity and Antiferromagnetism in Topological Magnet MnBi2Te4 Films
Wei Yuan, Zi-Jie Yan, Hemian Yi, Zihao Wang, Stephen Paolini, Yi-Fan Zhao, Ling-Jie Zhou, Annie G. Wang, Ke Wang, Thomas Prokscha, Zaher Salman, Andreas Suter, Purnima P. Balakrishnan, Alexander J. Grutter, Laurel E. Winter, John Singleton, Moses H. W. Chan, Cui-Zu Chang
arXiv:2402.09208v1 Announce Type: new Abstract: The interface of two materials can harbor unexpected emergent phenomena. One example is interface-induced superconductivity. In this work, we employ molecular beam epitaxy to grow a series of heterostructures formed by stacking together two non-superconducting antiferromagnetic materials, an intrinsic antiferromagnetic topological insulator MnBi2Te4 and an antiferromagnetic iron chalcogenide FeTe. Our electrical transport measurements reveal interface-induced superconductivity in these heterostructures. By performing scanning tunneling microscopy and spectroscopy measurements, we observe a proximity-induced superconducting gap on the top surface of the MnBi2Te4 layer, confirming the interaction between superconductivity and antiferromagnetism in the MnBi2Te4 layer. Our findings will advance the fundamental inquiries into the topological superconducting phase in hybrid devices and provide a promising platform for the exploration of chiral Majorana physics in MnBi2Te4-based heterostructures.

Quantized Thouless pumps protected by interactions in dimerized Rydberg tweezer arrays
Sergi Juli\`a-Farr\'e, Javier Arg\"uello-Luengo, Lo\"ic Henriet, Alexandre Dauphin
arXiv:2402.09311v1 Announce Type: new Abstract: We study Thouless pumps, i.e., adiabatic topological transport, in an interacting spin chain described by the dimerized XXZ Hamiltonian. In the noninteracting case, quantized Thouless pumps can only occur when a topological singularity is encircled adiabatically. In contrast, here we show that, in the presence of interactions, such topological transport can even persist for exotic paths in which the system gets arbitrarily close to the singularity. We illustrate the robustness of these exotic Thouless pumps through the behavior of the noninteracting singularity, which for sufficiently strong interactions splits into two singularities separated by a spontaneous antiferromagnetic insulator. We perform a numerical benchmark of these phenomena by means of tensor network simulations of ground-state physics and real-time adiabatic dynamics. Finally, we propose an experimental protocol with Floquet-driven Rydberg tweezer arrays.

A superstatistical measure of distance from canonical equilibrium
Sergio Davis
arXiv:2402.09393v1 Announce Type: new Abstract: Non-equilibrium systems in steady states are commonly described by generalized statistical mechanical theories such as non-extensive statistics and superstatistics. Superstatistics assumes that the inverse temperature $\beta = 1/(k_B T)$ follows some pre-established statistical distribution, however, it has been previously proved (Physica A 505, 864-870 [2018]) that $\beta$ cannot be associated to an observable function $B(\boldsymbol{\Gamma})$ of the microstates $\boldsymbol{\Gamma}$. In this work, we provide an information-theoretical interpretation of this theorem by introducing a new quantity $\mathcal{D}$, the mutual information between $\beta$ and $\boldsymbol{\Gamma}$. Our results show that $\mathcal{D}$ is also a measure of departure from canonical equilibrium, and reveal a minimum, non-zero uncertainty about $\beta$ given $\boldsymbol{\Gamma}$ for every non-canonical superstatistical ensemble. This supports the use of the mutual information as a descriptor of complexity and correlation in complex systems, also providing in some cases a sound basis for the use of Tsallis' entropic index $q$ as a measure of distance from equilibrium, being in those cases a proxy for $\mathcal{D}$.

Excitation signatures of isochorically heated electrons in solids at finite wavenumber explored from first principles
Zhandos A. Moldabekov, Thomas D. Gawne, Sebastian Schwalbe, Thomas R. Preston, Jan Vorberger, Tobias Dornheim
arXiv:2402.09005v1 Announce Type: cross Abstract: Ultrafast heating of solids with modern X-ray free electron lasers (XFELs) leads to a unique set of conditions that is characterized by the simultaneous presence of heated electrons in a cold ionic lattice. In this work, we analyze the effect of electronic heating on the dynamic structure factor (DSF) in bulk Aluminium (Al) with a face-centered cubic lattice and in silicon (Si) with a crystal diamond structure using first-principles linear-response time-dependent density functional theory simulations. We find a thermally induced red shift of the collective plasmon excitation in both materials. In addition, we show that the heating of the electrons in Al can lead to the formation of a double-plasmon peak due to the extension of the Landau damping region to smaller wavenumbers. Finally, we demonstrate that thermal effects generate a measurable and distinct signature (peak-valley structure) in the DSF of Si at small frequencies. Our simulations indicate that there is a variety of new features in the spectrum of X-ray-driven solids, specifically at finite momentum transfer, which can probed in upcoming X-ray Thomson scattering (XRTS) experiments at various XFEL facilities.

Metasurface of strongly coupled excitons and plasmonic arrays
Farsane Tabataba-Vakili, Lukas Krelle, Lukas Husel, Huy P. G. Nguyen, Zhijie Li, Ismail Bilgin, Kenji Watanabe, Takashi Taniguchi, Alexander H\"ogele
arXiv:2402.09037v1 Announce Type: cross Abstract: Metasurfaces allow to manipulate light at the nanoscale with planar lenses and holograms as prominent applications. Integrating metasurfaces with transition metal dichalcogenide monolayers provides additional functionality to ultrathin optics, such as tunable optical properties and enhanced light-matter interaction. Here, we developed a novel fabrication method that allows to directly integrate such a monolayer with a plasmonic lattice without compromising optical quality or coupling strength, by embedding the gold nanodisk array into an encapsulating hBN layer. We demonstrate plasmon-exciton-polaritons in this metasurface with a large Rabi splitting and strongly modified polarization and emission characteristics, as compared to a bare monolayer, achieving narrow-angle, directional, linearly polarized emission.

Atomistic Origin of Diverse Charge Density Wave States in CsV$_3$Sb$_5$
Binhua Zhang, Hengxin Tan, Binghai Yan, Changsong Xu, Hongjun Xiang
arXiv:2301.06278v2 Announce Type: replace Abstract: Kagome metals AV3Sb5 (A=K,Rb,or Cs) exhibit intriguing charge density wave (CDW) instabilities, which interplay with superconductivity and band topology. However, despite firm observations, the atomistic origins of the CDW phases, as well as hidden instabilities, remain elusive. Here, we adopt our newly developed symmetry-adapted cluster expansion method to construct a first-principles-based effective Hamiltonian of CsV3Sb5, which not only reproduces the established inverse star of David (ISD) phase, but also predict a series of D3h-n states under mild tensile strains. With such atomistic Hamiltonians, the microscopic origins of different CDW states are revealed as the competition of the second-nearest neighbor V-V pairs versus the first-nearest neighbor V-V and V-Sb couplings. Interestingly, the effective Hamiltonians also reveal the existence of ionic Dzyaloshinskii-Moriya interaction in the high-symmetry phase of CsV3Sb5 and drives the formation of non-collinear CDW patterns. Our work thus not only deepens the understanding of the CDW formation in AV3Sb5,but also demonstrates that the effective Hamiltonian is a suitable approach for investigating CDW mechanisms, which can be extended to various CDW systems.

Spin-orbit interaction enabled electronic Raman scattering from charge collective modes
Surajit Sarkar, Alexander Lee, Girsh Blumberg, Saurabh Maiti
arXiv:2306.11240v2 Announce Type: replace Abstract: Electronic Raman scattering in the fully symmetric channel couples to the charge excitations in the system, including the plasmons. However, the plasmon response has a spectral weight of $\sim q^2$, where $q$, the momentum transferred by light, is small. In this work, we show that in inversion symmetry broken systems where Rashba type spin-orbit coupling affects the states at the Fermi energy (which is a known low energy effect) as well as the transition elements to other states (a high energy effect), there is an additional coupling of the plasmons to the Raman vertex, even at zero momentum transfer, that results in a spectral weight that is proportional to the spin-orbit coupling. The high energy effect is due to the breaking of SU(2) spin invariance in the spin-flip transitions to the intermediate state. We present a theory for this coupling near the resonant regime of Raman scattering and show that in giant Rashba systems it can dominate over the conventional $q^2$ weighted coupling. We also provide experimental support along with a symmetry based justification for this spin-mediated coupling by identifying a prominent c-axis plasmon peak in the fully symmetric channel of the resonant Raman spectrum of the giant Rashba material BiTeI. This new coupling could lead to novel ways of manipulating coherent charge excitations in inversion-broken systems. This process is also relevant for spectroscopic studies in ultrafast spectroscopies, certain driven Floquet systems and topologically non-trivial phases of matter where strong inversion-breaking spin-orbit coupling plays a role.

Observation of broadening Rashba-type band in Au2Sb surface alloy
Jinbang Hu, Xiansi Wang, Justin Wells
arXiv:2308.06183v2 Announce Type: replace Abstract: Here, we report a novel AuSb 2D superstructure on Au(111) that shows agreements and discrepancies to the expected electronic features of the ideal 2D surface alloys with $\sqrt{3}\times\sqrt{3}$ periodicity. Using spin- and angle-resolved photoemission spectroscopy, we find a significant spin splitting of the alloy bands with antiparallel spin polarization. The band structure originates from the hybridization between the Sb and the Au orbitals at the 2D Sb-Au interface. Taking advantage of the good agreement between the experimental results and DFT calculations, we find the broadening of the band is due to the perturbations introduced by the 3-pointed-star-shaped defects as nonresonant impurities in the $8\times8$ superstructure. The periodic defect can properly adjust the energy position of the Rashba band while not breaking the in-plane symmetry.

Proposal for all-electrical skyrmion detection in van der Waals tunnel junctions
Dongzhe Li, Soumyajyoti Haldar, Stefan Heinze
arXiv:2309.03828v3 Announce Type: replace Abstract: A major challenge for magnetic skyrmions in atomically thin van der Waals (vdW) materials is reliable skyrmion detection. Here, based on rigorous first-principles calculations, we show that all-electrical skyrmion detection is feasible in 2D vdW magnets via scanning tunneling microscopy (STM) and in planar tunnel junctions. We use the nonequilibrium Green's function method for quantum transport in planar junctions, including self-energy due to electrodes and working conditions, going beyond the standard Tersoff-Hamann approximation. We obtain a very large tunneling anisotropic magnetoresistance (TAMR) around the Fermi energy for a vdW tunnel junction based on graphite/Fe$_3$GeTe$_2$/germanene/graphite. For atomic-scale skyrmions the noncollinear magnetoresistance (NCMR) reaches giant values. We trace the origin of the NCMR to spin-mixing between spin-up and -down states of $p_z$ and $d_{z^2}$ character at the surface atoms. Both TAMR and NCMR are drastically enhanced in tunnel junctions with respect to STM geometry due to orbital symmetry matching at the interface.

Transport response of topological hinge modes in $\alpha$-Bi$_4$Br$_4$
Md Shafayat Hossain, Qi Zhang, Zhiwei Wang, Nikhil Dhale, Wenhao Liu, Maksim Litskevich, Brian Casas, Nana Shumiya, Jia-Xin Yin, Tyler A. Cochran, Yongkai Li, Yu-Xiao Jiang, Ying Yang, Guangming Cheng, Zi-Jia Cheng, Xian P. Yang, Nan Yao, Titus Neupert, Luis Balicas, Yugui Yao, Bing Lv, M. Zahid Hasan
arXiv:2312.09487v2 Announce Type: replace Abstract: Electronic topological phases are renowned for their unique properties, where conducting surface states exist on the boundary of an insulating three-dimensional bulk. While the transport response of the surface states has been extensively studied, the response of the topological hinge modes remains elusive. Here, we investigate a layered topological insulator $\alpha$-Bi$_4$Br$_4$, and provide the first evidence for quantum transport in gapless topological hinge states existing within the insulating bulk and surface energy gaps. Our magnetoresistance measurements reveal pronounced h/e periodic (where h denotes Planck's constant and e represents the electron charge) Aharonov-Bohm oscillation. The observed periodicity, which directly reflects the enclosed area of phase-coherent electron propagation, matches the area enclosed by the sample hinges, providing compelling evidence for the quantum interference of electrons circumnavigating around the hinges. Notably, the h/e oscillations evolve as a function of magnetic field orientation, following the interference paths along the hinge modes that are allowed by topology and symmetry, and in agreement with the locations of the hinge modes according to our scanning tunneling microscopy images. Remarkably, this demonstration of quantum transport in a topological insulator can be achieved using a flake geometry and we show that it remains robust even at elevated temperatures. Our findings collectively reveal the quantum transport response of topological hinge modes with both topological nature and quantum coherence, which can be directly applied to the development of efficient quantum electronic devices.

Anomalous relaxation and hyperuniform fluctuations in center-of-mass conserving systems with broken time-reversal symmetry
Anirban Mukherjee, Dhiraj Tapader, Animesh Hazra, Punyabrata Pradhan
arXiv:2312.11181v2 Announce Type: replace Abstract: We study a paradigmatic model of absorbing-phase transition - the Oslo model - on a one-dimensional ring of $L$ sites with a fixed global density $\bar{\rho}$; notably, microscopic dynamics conserve both mass and \textit{center of mass (CoM), but lacks time-reversal symmetry}. Despite having highly constrained dynamics due to CoM conservation, the system exhibits diffusive relaxation away from criticality and superdiffusive relaxation near criticality. Furthermore, the CoM conservation severely restricts particle movement, rendering the mobility to vanish exactly. Indeed the temporal growth of current fluctuation is qualitatively different from that observed in diffusive systems with a single conservation law. Away from criticality, steady-state fluctuation $\langle \mathcal{Q}_i^2(T,\Delta) \rangle$ of current $\mathcal{Q}_i$ across $i$th bond up to time $T$ \textit{saturates} as $\langle \mathcal{Q}_i^2 \rangle \simeq \Sigma_Q^2(\Delta) - {\rm const.} T^{-1/2}$; near criticality, it grows subdiffusively as $\langle \mathcal{Q}_i^2 \rangle \sim T^\alpha$, with $0 < \alpha < 1/2$, and eventually \textit{saturates} to $\Sigma_Q^2(\Delta)$. The asymptotic current fluctuation $\Sigma_Q^2(\Delta)$ is a \textit{nonmonotonic} function of $\Delta$: It diverges as $\Sigma_Q^2(\Delta) \sim \Delta^2$ for $\Delta \gg \rho_c$ and $\Sigma_Q^2(\Delta) \sim \Delta^{-\delta}$, with $\delta > 0$, for $\Delta \to 0^+$. By using a mass-conservation principle, we exactly determine the exponents $\delta = 2(1-1/\nu_\perp)/\nu_\perp$ and $\alpha = \delta/z \nu_\perp$ via the correlation-length and dynamic exponents, $\nu_\perp$ and $z$, respectively. Finally, we show that, in the steady state, the self-diffusion coefficient $\mathcal{D}_s(\bar{\rho})$ of tagged particles is connected to activity by $\mathcal{D}_s(\bar{\rho}) = a(\bar{\rho}) / \bar{\rho}$.

Disorder-Induced Topological Transitions in a Multilayer Topological Insulator
Z. Z. Alisultanov, A. Kudlis
arXiv:2402.06280v2 Announce Type: replace Abstract: We examine the impact of non-magnetic disorder on the electronic states of a multilayer structure comprising layers of both topological and conventional band insulators. Employing the Burkov-Balents model with renormalized tunneling parameters, we generate phase diagrams correlating with disorder, demonstrating that non-magnetic disorder can induce transitions between distinct topological phases. The subsequent section of our investigation focuses on the scenario where disorder is unevenly distributed across layers, resulting in fluctuations of the interlayer tunneling parameter - termed off-diagonal disorder. Furthermore, we determine the density of states employing the self-consistent single-site diagram technique, expanding the Green function in relation to the interlayer tunneling parameter (locator method). Our findings reveal that off-diagonal disorder engenders delocalized bulk states within the band gap. The emergence of these states may lead to the breakdown of the anomalous quantum Hall effect (AQHE) phase, a phenomenon that has garnered significant attention from researchers in the realm of topological heterostructures. Nonetheless, our results affirm the stability of the Weyl semimetal phase even under substantial off-diagonal disorder.

Stationary Two-State System in Optics using Layered Materials
Ken-ichi Sasaki
arXiv:2303.08395v3 Announce Type: replace-cross Abstract: When electrodynamics is quantized in a situation where electrons are confined to a flat surface, as in the case of graphene, one of the Maxwell's equations emerges as a local component of the Hamiltonian. We demonstrate that, owing to the residual gauge invariance for the local Hamiltonian, nontrivial constraints on physical states arise. We construct two stationary quantum states with a zero energy expectation value: one replicates the scattering and absorption of light, a phenomenon familiar in classical optics, while the other is more fundamentally associated with photon creation. According to the Hamiltonian, these two states are inseparable, forming a two-state system. However, there exists a specific number of surfaces for which the two states become decoupled. This number is $2/\pi \alpha$, where $\pi \alpha$ is the absorption probability of a single surface. To explore the physics that can emerge in such decoupled cases, we investigate certain perturbations that can influence a two-state system based on symmetry considerations, utilizing concepts such as parity, axial (pseudo) gauge fields, and surface deformation.

Non-Abelian Topological Order and Anyons on a Trapped-Ion Processor
Mohsin Iqbal, Nathanan Tantivasadakarn, Ruben Verresen, Sara L. Campbell, Joan M. Dreiling, Caroline Figgatt, John P. Gaebler, Jacob Johansen, Michael Mills, Steven A. Moses, Juan M. Pino, Anthony Ransford, Mary Rowe, Peter Siegfried, Russell P. Stutz, Michael Foss-Feig, Ashvin Vishwanath, Henrik Dreyer
arXiv:2305.03766v2 Announce Type: replace-cross Abstract: Non-Abelian topological order (TO) is a coveted state of matter with remarkable properties, including quasiparticles that can remember the sequence in which they are exchanged. These anyonic excitations are promising building blocks of fault-tolerant quantum computers. However, despite extensive efforts, non-Abelian TO and its excitations have remained elusive, unlike the simpler quasiparticles or defects in Abelian TO. In this work, we present the first unambiguous realization of non-Abelian TO and demonstrate control of its anyons. Using an adaptive circuit on Quantinuum's H2 trapped-ion quantum processor, we create the ground state wavefunction of $D_4$ TO on a kagome lattice of 27 qubits, with fidelity per site exceeding $98.4\%$. By creating and moving anyons along Borromean rings in spacetime, anyon interferometry detects an intrinsically non-Abelian braiding process. Furthermore, tunneling non-Abelions around a torus creates all 22 ground states, as well as an excited state with a single anyon -- a peculiar feature of non-Abelian TO. This work illustrates the counterintuitive nature of non-Abelions and enables their study in quantum devices.

Absence of barren plateaus in finite local-depth circuits with long-range entanglement
Hao-Kai Zhang, Shuo Liu, Shi-Xin Zhang
arXiv:2311.01393v2 Announce Type: replace-cross Abstract: Ground state preparation is classically intractable for general Hamiltonians. On quantum devices, shallow parameterized circuits can be effectively trained to obtain short-range entangled states under the paradigm of variational quantum eigensolver, while deep circuits are generally untrainable due to the barren plateau phenomenon. In this Letter, we give a general lower bound on the variance of circuit gradients for arbitrary quantum circuits composed of local 2-designs. Based on our unified framework, we prove the absence of barren plateaus in training finite local-depth circuits (FLDC) for the ground states of local Hamiltonians. FLDCs are allowed to be deep in the conventional circuit depth to generate long-range entangled ground states, such as topologically ordered states, but their local depths are finite, i.e., there is only a finite number of gates acting on individual qubits. This characteristic sets FLDC apart from shallow circuits: FLDC in general cannot be classically simulated to estimate local observables efficiently by existing tensor network methods in two and higher dimensions. We validate our analytical results with extensive numerical simulations and demonstrate the effectiveness of variational training using the generalized toric code model.

Found 8 papers in prb
Date of feed: Thu, 15 Feb 2024 04:17:02 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]+)|(flatband)|(flat.{1}band)|(LK.{1}99)

Superconducting properties of Bernevig-Hughes-Zhang model: Theory and applications to transition metal dichalcogenides
Haijiao Ji and Noah F. Q. Yuan
Author(s): Haijiao Ji and Noah F. Q. Yuan

We investigate the superconducting properties of two-dimensional topological materials, in particular the quantum spin Hall system with on-site pairing. Accordingly, three types of edge states are found, which are topologically protected fermionic states at zero field, topologically protected Majora…

[Phys. Rev. B 109, 054510] Published Wed Feb 14, 2024

Majorana bound state parity exchanges in planar Josephson junctions
Varsha Subramanyan, Jukka I. Väyrynen, Alex Levchenko, and Smitha Vishveshwara
Author(s): Varsha Subramanyan, Jukka I. Väyrynen, Alex Levchenko, and Smitha Vishveshwara

We describe a scheme to exchange fermion parity between two pairs of Majorana bound states mediated by coupling with a centralized quantum dot. We formulate such a scheme for Majorana bound states nucleated in the Josephson vortices formed in a fourfold crossroads junction of planar topological supe…

[Phys. Rev. B 109, 054511] Published Wed Feb 14, 2024

Dual-polarization helical interface states in inverse-designed photonic crystals with glide symmetry
Yafeng Chen, Hai-Xiao Wang, Zhihao Lan, and Zhongqing Su
Author(s): Yafeng Chen, Hai-Xiao Wang, Zhihao Lan, and Zhongqing Su

Photonic analogs of topological crystalline insulators (PTCIs) that host pseudospin-locked unidirectional helical interface states have promising applications for developing novel integrated optical devices. However, current PTCIs are limited to a single polarization. Here, we propose a dual-polariz…

[Phys. Rev. B 109, 075132] Published Wed Feb 14, 2024

Berry curvature dipole in bilayer graphene with interlayer sliding
Jie Pan, Haibo Xie, Pengyuan Shi, Xiaoyu Wang, Lihao Zhang, and Zhe Wang
Author(s): Jie Pan, Haibo Xie, Pengyuan Shi, Xiaoyu Wang, Lihao Zhang, and Zhe Wang

Lowering lattice symmetry plays a pivotal role in generating a nonzero Berry curvature dipole. In this work, we demonstrate that introducing an interlayer sliding in bilayer graphene effectively breaks the inherent threefold rotational symmetry, thus giving rise to a nonzero Berry curvature dipole. …

[Phys. Rev. B 109, 075415] Published Wed Feb 14, 2024

Effect of interatomic repulsion on Majorana zero modes in a coupled quantum-dot–superconducting-nanowire hybrid system
R. Kenyi Takagui Pérez and A. A. Aligia
Author(s): R. Kenyi Takagui Pérez and A. A. Aligia

We study the low-energy eigenstates of a topological superconductor wire modeled by a Kitaev chain, which is connected at one of its ends to a quantum dot through nearest-neighbor (NN) hopping and NN Coulomb repulsion. Using an unrestricted Hartree-Fock approximation to decouple the Coulomb term, we…

[Phys. Rev. B 109, 075416] Published Wed Feb 14, 2024

Interacting bosons on a Su-Schrieffer-Heeger ladder: Topological phases and Thouless pumping
Ashirbad Padhan, Suman Mondal, Smitha Vishveshwara, and Tapan Mishra
Author(s): Ashirbad Padhan, Suman Mondal, Smitha Vishveshwara, and Tapan Mishra

We study the topological properties of hardcore bosons on a two-leg ladder consisting of two Su-Schrieffer-Heeger chains that are coupled via hopping and interaction. We chart out the phase diagram for the system and show that based on the relative hopping dimerization pattern along the legs, distin…

[Phys. Rev. B 109, 085120] Published Wed Feb 14, 2024

Ground-state phase diagram and superconductivity of the doped Hubbard model on six-leg square cylinders
Yi-Fan Jiang, Thomas P. Devereaux, and Hong-Chen Jiang
Author(s): Yi-Fan Jiang, Thomas P. Devereaux, and Hong-Chen Jiang

The authors employ the density-matrix renormalization group to investigate the doped Hubbard model on six-leg square cylinders. It uncovers a rich quantum phase diagram, intricately sensitive to next-nearest-neighbor electron hopping (t). The positive-t′ region shows a robust d-wave superconducting phase with intertwined superconducting and charge-density-wave orders. In contrast, the negative-t′ side remains insulating, where doped holes form either long-range charge stripe order at small t′ or a holon Wigner crystal with one doped hole per emergent unit cell and short-range spin correlations at larger t’.

[Phys. Rev. B 109, 085121] Published Wed Feb 14, 2024

Topological states in a five-dimensional non-Hermitian system
Xingen Zheng, Tian Chen, and Xiangdong Zhang
Author(s): Xingen Zheng, Tian Chen, and Xiangdong Zhang

Revealing new topological phases is of utmost importance in both Hermitian and non-Hermitian systems due to their potential applications. Generally, topological phases depend on the dimension of the system. Previous studies have shown that five-dimensional (5D) Hermitian systems exhibit certain phas…

[Phys. Rev. B 109, 085307] Published Wed Feb 14, 2024

Found 1 papers in prl
Date of feed: Thu, 15 Feb 2024 04:17:03 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]+)|(flatband)|(flat.{1}band)|(LK.{1}99)

Stable Measurement-Induced Floquet Enriched Topological Order
DinhDuy Vu, Ali Lavasani, Jong Yeon Lee, and Matthew P. A. Fisher
Author(s): DinhDuy Vu, Ali Lavasani, Jong Yeon Lee, and Matthew P. A. Fisher

The Floquet code utilizes a periodic sequence of two-qubit measurements to realize the topological order. After each measurement round, the instantaneous stabilizer group can be mapped to a honeycomb toric code, explaining the topological feature. The code also possesses a time-crystal order—the $e\…

[Phys. Rev. Lett. 132, 070401] Published Wed Feb 14, 2024

Found 1 papers in pr_res
Date of feed: Thu, 15 Feb 2024 04:17:02 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]+)|(flatband)|(flat.{1}band)|(LK.{1}99)

Interacting random-field dipole defect model for heating in semiconductor-based qubit devices
Yujun Choi and Robert Joynt
Author(s): Yujun Choi and Robert Joynt

Semiconductor qubit devices suffer from the drift of important device parameters as they are operated. The most important example is a shift in qubit operating frequencies. This effect appears to be directly related to the heating of the system as gate operations are applied. We show that the main f…

[Phys. Rev. Research 6, 013168] Published Wed Feb 14, 2024

Found 2 papers in acs-nano
Date of feed: Wed, 14 Feb 2024 14:04:30 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]+)|(flatband)|(flat.{1}band)|(LK.{1}99)

[ASAP] Environmental and Health Impacts of Graphene and Other Two-Dimensional Materials: A Graphene Flagship Perspective
Hazel Lin, Tina Buerki-Thurnherr, Jasreen Kaur, Peter Wick, Marco Pelin, Aurelia Tubaro, Fabio Candotto Carniel, Mauro Tretiach, Emmanuel Flahaut, Daniel Iglesias, Ester Vázquez, Giada Cellot, Laura Ballerini, Valentina Castagnola, Fabio Benfenati, Andrea Armirotti, Antoine Sallustrau, Frédéric Taran, Mathilde Keck, Cyrill Bussy, Sandra Vranic, Kostas Kostarelos, Mona Connolly, José Maria Navas, Florence Mouchet, Laury Gauthier, James Baker, Blanca Suarez-Merino, Tomi Kanerva, Maurizio Prato, Bengt Fadeel, and Alberto Bianco

TOC Graphic

ACS Nano
DOI: 10.1021/acsnano.3c09699

[ASAP] In Situ Molecular Engineering Strategy to Construct Hierarchical MoS2 Double-Layer Nanotubes for Ultralong Lifespan “Rocking-Chair” Aqueous Zinc-Ion Batteries
Feier Niu, Zhongchao Bai, Junming Chen, Qinfen Gu, Xuchun Wang, Jumeng Wei, Yueyuan Mao, Shi Xue Dou, and Nana Wang

TOC Graphic

ACS Nano
DOI: 10.1021/acsnano.3c12034

Found 2 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]+)|(flatband)|(flat.{1}band)|(LK.{1}99)

Heavy fermions vs doped Mott physics in heterogeneous Ta-dichalcogenide bilayers
< author missing >

Resolving the topology of encircling multiple exceptional points
< 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]+)|(flatband)|(flat.{1}band)|(LK.{1}99)

Lattice Regularization of Reduced Kähler-Dirac Fermions and Connections to Chiral Fermions, by Simon Catterall
< author missing >
Submitted on 2024-02-14, refereeing deadline 2024-03-21.