Found 26 papers in cond-mat
Date of feed: Fri, 19 Jan 2024 01:30:00 GMT

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Light-matter interaction in 2D materials in weak and strong-coupling regimes. (arXiv:2401.09470v1 [cond-mat.mes-hall])
Dogyun Ko

This thesis studies light-matter interactions in strong and weak coupling regimes. In the first part, we study the formation and propagation of exciton-polariton condensates in different microcavities in the strong coupling regime. Exciton-polaritons are composite quasiparticles created as a result of the strong coupling between microcavity photons and quantum well excitons. In the first part of the thesis, we take a system of exciton-polaritons in a Kagome lattice and show that an initially localized condensate propagates in a specific direction in space in the presence of anisotropy in the lattice, and the initially localized condensate experiences revivals. We also study the formation of exciton-polariton condensates in two different lowest energy states at an exciton-polariton microcavity and the transition from the higher energy state to the ground state under pulsed and continuous wave excitation conditions by using various pump profiles. In the second part of the thesis, we study the valley selection rules for the optical transitions from impurity states to the conduction band in two-dimensional Dirac materials, taking a monolayer of MoS2 as an example, we focus on the weak light-matter coupling regime. We find the spectrum of the light absorption coefficients and calculate the photon-drag electric current density due to the impurity-band transitions.


Quantum Phase Transitions and Dynamics in Perturbed Flatbands. (arXiv:2401.09485v1 [cond-mat.dis-nn])
Sanghoon Lee

In recent years, there has been a growing interest in flatband systems which exhibit macroscopic degeneracies. These systems offer a valuable mathematical framework for the extreme sensitivity to perturbations and interactions. This sensitivity unveils a wide variety of exotic and unconventional physical phenomena. Moreover, the progress in their experimental realization contributes to the expanding landscape of exploration in this field. This thesis aims to summarize all the works throughout the Ph.D. program. Firstly, an in-depth exploration was conducted on the impact of weak quasiperiodic perturbations on one-dimensional two-band all-bands-flat lattices. These tight-binding Hamiltonian are diagonalized through a sequence of local unitary transformations. By adjusting the quasiperiodic potential parameters, the key achievement involves finding a critical-to-insulator transition and identifying fractality edges in the flatband systems with quasiperiodic perturbations. Next, the investigation delved into the effects of on-site interactions among hard-core bosons in one- and two-dimensional cross-stitch lattices. One key finding is that groundstate energy primarily depends on compact localized states. Moreover, the presence of barriers of compact localized states trap bosons, leading to the emergence of non-ergodic excitation and Hilbert space fragmentation. Lastly, a compact localized eigenstate of the one-dimensional diamond chain using an electric circuit was successfully generated via local (linear and non-linear) driving. This achievement opens up a versatile circuit platform for the generation of flatbands and holds promise for potential applications in the field of quantum information. I hope these collective efforts have expanded the frontiers of the field and made a meaningful contribution to the scientific community.


Universal Vortex Statistics and Stochastic Geometry of Bose-Einstein Condensation. (arXiv:2401.09525v1 [cond-mat.quant-gas])
Mithun Thudiyangal, Adolfo del Campo

The cooling of a Bose gas in finite time results in the formation of a Bose-Einstein condensate that is spontaneously proliferated with vortices. We propose that the vortex spatial statistics is described by a homogeneous Poisson point process (PPP) with a density dictated by the Kibble-Zurek mechanism (KZM). We validate this model using numerical simulations of the two-dimensional stochastic Gross-Pitaevskii equation (SGPE) for both a homogeneous and a hard-wall trapped condensate. The KZM scaling of the average vortex number with the cooling rate is established along with the universal character of the vortex number distribution. The spatial statistics between vortices is characterized by analyzing the two-point defect-defect correlation function, the corresponding spacing distributions, and the random tessellation of the vortex pattern using the Voronoi cell area statistics. Combining the PPP description with the KZM, we derive universal theoretical predictions for each of these quantities and find them in agreement with the SGPE simulations. Our results establish the universal character of the spatial statistics of point-like topological defects generated during a continuous phase transition and the associated stochastic geometry.


Interferometric Single-Shot Parity Measurement in an InAs-Al Hybrid Device. (arXiv:2401.09549v1 [cond-mat.mes-hall])
Morteza Aghaee, Alejandro Alcaraz Ramirez, Zulfi Alam, Rizwan Ali, Mariusz Andrzejczuk, Andrey Antipov, Mikhail Astafev, Amin Barzegar, Bela Bauer, Jonathan Becker, Alex Bocharov, Srini Boddapati, David Bohn, Jouri Bommer, Esben Bork Hansen, Leo Bourdet, Arnaud Bousquet, Samuel Boutin, Signe Brynold Markussen, Juan Carlos Estrada Saldaña, Lucas Casparis, Benjamin James Chapman, Sohail Chatoor, Cassandra Chua, Patrick Codd, William Cole, Paul Cooper, Fabiano Corsetti, Ajuan Cui, Juan Pablo Dehollain, Paolo Dalpasso, Michiel de Moor, Gijs de Lange, Andreas Ekefjärd, Tareq El Dandachi, Saeed Fallahi, Luca Galletti, Geoff Gardner, Deshan Govender, Flavio Griggio, Ruben Grigoryan, Sebastian Grijalva, Sergei Gronin, Jan Gukelberger, Marzie Hamdast, Firas Hamze, Morten Hannibal Madsen, et al. (111 additional authors not shown)

The fusion of non-Abelian anyons or topological defects is a fundamental operation in measurement-only topological quantum computation. In topological superconductors, this operation amounts to a determination of the shared fermion parity of Majorana zero modes. As a step towards this, we implement a single-shot interferometric measurement of fermion parity in an indium arsenide-aluminum heterostructure with a gate-defined nanowire. The interferometer is formed by tunnel-coupling the proximitized nanowire to quantum dots. The nanowire causes a state-dependent shift of these quantum dots' quantum capacitance of up to 1 fF. Our quantum capacitance measurements show flux $h/2e$-periodic bimodality with a signal-to-noise ratio of 1 in 3.7 $\mu\text{s}$ at optimal flux values. From the time traces of the quantum capacitance measurements, we extract a dwell time in the two associated states that is longer than 1 ms at in-plane magnetic fields of approximately 2 T. These results are consistent with a measurement of the fermion parity encoded in a pair of Majorana zero modes that are separated by approximately 3 \textmu m and subjected to a low rate of poisoning by non-equilibrium quasiparticles. The large capacitance shift and long poisoning time enable a minimum measurement error probability of $1\%$.


Exploring Lead Free Mixed Halide Double Perovskites Solar Cell. (arXiv:2401.09584v1 [cond-mat.mtrl-sci])
Md Yekra Rahman, Dr. Sharif Mohammad Mominuzzaman

The significant surge in energy use and escalating environmental concerns have sparked worldwide interest towards the study and implementation of solar cell technology. Perovskite solar cells (PSCs) have garnered remarkable attention as an emerging third-generation solar cell technology. This paper presents an in-depth analysis of lead-free mixed halide double perovskites in the context of their potential uses in solar cell technology. Through the previous studies of various mixed halide double perovskite materials as potential absorber layer materials, it has been observed that Cs$_2$TiI$_{6-x}$Br$_x$ possesses promising characteristics. In this study, simulations were conducted using SCAPS-1D software to explore all possible combinations for x= 0 to 6. The materials for the Hole Transport Layer (HTL) and Electron Transport Layer (ETL) and absorber layer, along with their optimal thicknesses, are selected to yield the most promising results in terms of open-circuit voltage (V$_{oc}$), short-circuit current density (J$_{sc}$), fill factor (FF), and power conversion efficiency. A novel tolerance factor is employed to assess structural stability of perovskites. FTO/Cu$_2$O/Cs$_2$TiI$_5$Br$_1$/WS$_2$ emerges as the best combination in terms of the efficiency with 19.03% but FTO/Cu$_2$O/Cs$_2$TiI$_2$Br$_4$/WS$_2$ shows good stability with 13.31% efficiency.


Suppression of metal-to-insulator transition and stabilization of superconductivity by pressure in Re3Ge7. (arXiv:2401.09592v1 [cond-mat.supr-con])
S. Huyan, E. Mun, H. Wang, T. J. Slade, Z. Li, J. Schmidt, R. A. Ribeiro, W. Xie, S. L. Bud'ko, P. C. Canfield

The effect of pressure on the low-temperature states of the Re3Ge7 is investigated by both electrical and Hall resistance and magnetization measurements. At ambient pressure, the temperature dependent resistance of Re3Ge7 behaves quasi-linearly from room temperature down to 60 K, then undergoes a two-step metal-to-insulator transitions (MIT) at temperatures T1 = 59.4 K and T2 = 58.7 K which may be related to a structural phase transition or occurrence of charge density wave ordering. Upon applying pressure, the two-step (T1, T2) MIT splits into three steps (T1, T2 and T3) above 1 GPa, and all traces of MITs are fully suppressed by ~8 GPa. Subsequently, the onset of bulk superconductivity (SC) occurs between 10.8 and 12.2 GPa and persists to our highest pressure of 26.8 GPa. At 12.2 GPa the superconducting transition temperature, Tc, and upper critical field, Hc2 reach the maximum of Tc (onset) ~5.9 K and Hc2 (1.8 K) ~ 14 kOe. Our results not only present the observation of SC under high pressure in Re3Ge7 but also delineate the interplay between SC and other competing electronic states by creating a T - p phase diagram for this potentially topologically nontrivial system Re3Ge7.


Pressure-induced superconductivity in a novel germanium allotrope. (arXiv:2401.09625v1 [cond-mat.supr-con])
Liangzi Deng (1), Jianbo Zhang (2), Yuki Sakai (3), Zhongjia Tang (4), Moein Adnani (1), Rabin Dahal (1), Alexander P. Litvinchuk (1), James R. Chelikowsky (3 and 5), Marvin L. Cohen (6 and 7), Russell J. Hemley (8), Arnold Guloy (4), Yang Ding (2), Ching-Wu Chu (1 and 7) ((1) Texas Center for Superconductivity and Department of Physics, University of Houston, Houston, Texas, USA, (2) Center for High Pressure Science and Technology Advanced Research, Beijing, China, (3) Center for Computational Materials, Oden Institute of Computational Engineering and Sciences, University of Texas at Austin, Austin, Texas, USA, (4) Texas Center for Superconductivity and Department of Chemistry, University of Houston, Houston, Texas, USA, (5) Department of Physics and McKetta Department of Chemical Engineering, University of Texas at Austin, Austin, Texas, USA, (6) Department of Physics, University of California at Berkeley, Berkeley, California, USA, (7) Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California, USA, (8) Departments of Physics, Chemistry, and Earth and Environmental Sciences, University of Illinois Chicago, Chicago, Illinois, USA)

High-pressure studies on elements play an essential role in superconductivity research, with implications for both fundamental science and applications. Here we report the experimental discovery of surprisingly low pressure driving a novel germanium allotrope into a superconducting state in comparison to that for alpha-Ge. Raman measurements revealed structural phase transitions and possible electronic topological transitions under pressure up to 58 GPa. Based on pressure-dependent resistivity measurements, superconductivity was induced above 2 GPa and the maximum Tc of 6.8 K was observed under 4.6 GPa. Interestingly, a superconductivity enhancement was discovered during decompression, indicating the possibility of maintaining pressure-induced superconductivity at ambient pressure with better superconducting performance. Density functional theory analysis further suggested that the electronic structure of Ge (oP32) is sensitive to its detailed geometry and revealed that disorder in the beta-tin structure leads to a higher Tc in comparison to the perfect beta-tin Ge.


Colossal Layer Nernst Effect in Twisted Moir\'{e} Layers. (arXiv:2401.09661v1 [cond-mat.supr-con])
Jin-Xin Hu, Chuanchang Zeng, Yugui Yao

Intriguing Nernst effects offer the prospect of engineering micro- and nano-sized thermoelectric devices, facilitating heat harvesting, energy conversion, and directional temperature control. In this Letter, we establish a theoretical analysis of the layer Nernst effect (LNE) in twisted moir\'{e} layers subjected to a temperature gradient. Our analysis reveals the emergence of a layer-contrasted Nernst voltage perpendicular to the direction of the temperature gradient. This phenomenon arises from the trigonal warping of the Fermi surface and the layer pseudomagnetic field. The Fermi surface's trigonal warping, breaking intra-valley inversion symmetry, leads to an imbalance between left and right movers, resulting in a non-vanishing LNE. We validate our theoretical framework by applying it to twisted bilayer graphene (TBG). Importantly, our findings indicate that the Nernst coefficient in TBG can reach values as high as $\mu$A/K, surpassing those of previously known materials by three orders of magnitude. These results provide a foundation for utilizing TBG and other twisted moir\'{e} layers as promising platforms to explore layer caloritronics and develop thermoelectric devices.


Optical properties and plasmons in moir\'e structures. (arXiv:2401.09667v1 [cond-mat.mtrl-sci])
Xueheng Kuang, Pierre A. Pantaleón Peralta, Jose Angel Silva-Guillén, Shengjun Yuan, Francisco Guinea, Zhen Zhan

The discoveries of numerous exciting phenomena in twisted bilayer graphene (TBG) are stimulating significant investigations on moir\'e structures that possess a tunable moir\'e potential. Optical response can provide insights into the electronic structures and transport phenomena of non-twisted and twisted moir\'e structures. In this article, we review both experimental and theoretical studies of optical properties such as optical conductivity, dielectric function, non-linear optical response, and plasmons in moir\'e structures composed of graphene, hexagonal boron nitride (hBN), and/or transition metal dichalcogenides (TMDCs). Firstly, a comprehensive introduction to the widely employed methodology on optical properties is presented. After, moir\'e potential induced optical conductivity and plasmons in non-twisted structures are reviewed, such as single layer graphene-hBN, bilayer graphene-hBN and graphene-metal moir\'e heterostructures. Next, recent investigations of twist-angle dependent optical response and plasmons are addressed in twisted moir\'e structures. Additionally, we discuss how optical properties and plasmons could contribute to the understanding of the many-body effects and superconductivity observed in moir\'e structures.


Higher bracket structure of density operators in Weyl fermion systems and topological insulators. (arXiv:2401.09683v1 [cond-mat.str-el])
Edwin Langmann, Shinsei Ryu, Ken Shiozaki

We study the algebraic structure of electron density operators in gapless Weyl fermion systems in $d=3,5,7,\cdots$ spatial dimensions and in topological insulators (without any protecting symmetry) in $d=4,6,8,\cdots$ spatial dimensions. These systems are closely related by the celebrated bulk-boundary correspondence. Specifically, we study the higher bracket -- a generalization of commutator for more than two operators -- of electron density operators in these systems. For topological insulators, we show that the higher-bracket algebraic structure of density operators structurally parallels with the Girvin-MacDonald-Platzman algebra (the $W_{1+\infty}$ algebra), the algebra of electron density operators projected onto the lowest Landau level in the quantum Hall effect. By the bulk-boundary correspondence, the bulk higher-bracket structure mirrors its counterparts at the boundary. Specifically, we show that the density operators of Weyl fermion systems, once normal-ordered with respect to the ground state, their higher bracket acquires a c-number part. This part is an analog of the Schwinger term in the commutator of the fermion current operators. We further identify this part with a cyclic cocycle, which is a topological invariant and an element of Connes' noncommutative geometry.


Probing quantum geometry through optical conductivity and magnetic circular dichroism. (arXiv:2401.09689v1 [cond-mat.mtrl-sci])
Barun Ghosh, Yugo Onishi, Su-Yang Xu, Hsin Lin, Liang Fu, Arun Bansil

Probing ground-state quantum geometry and topology through optical response is not only of fundamental interest, but it can also offer several practical advantages. Here, using first-principles calculations on antiferromagnetic topological insulator MnBi$_2$Te$_4$ thin films, we demonstrate how the generalized optical weight arising from the absorptive part of the optical conductivity can be used to probe the ground state quantum geometry and topology. We show that three septuple layers MnBi$_2$Te$_4$ exhibit an enhanced almost perfect magnetic circular dichroism for a narrow photon energy window in the infrared region. We calculate the quantum weight in a few septuple layers MnBi$_2$Te$_4$ and show that it far exceeds the lower bound provided by the Chern number. Our results suggest that the well-known optical methods are powerful tools for probing the ground state quantum geometry and topology.


Crystal Transformer Based Universal Atomic Embedding for Accurate and Transferable Prediction of Materials Properties. (arXiv:2401.09755v1 [cond-mat.mtrl-sci])
Luozhijie Jin, Zijian Du, Le Shu, Yongfeng Mei, Hao Zhang

In this work, we propose a novel approach to generate universal atomic embeddings, significantly enhancing the representational and accuracy aspects of atomic embeddings, which ultimately improves the accuracy of property prediction. Moreover, we demonstrate the excellent transferability of universal atomic embeddings across different databases and various property tasks. Our approach centers on developing the CrystalTransformer model. Unlike traditional methods, this model does not possess a fundamental graph network architecture but utilizes the Transformer architecture to extract latent atomic features. This allows the CrystalTransformer to mitigate the inherent topological information bias of graph neural networks while maximally preserving the atomic chemical information, making it more accurate in encoding complex atomic features and thereby offering a deeper understanding of the atoms in materials. In our research, we highlight the advantages of CrystalTransformer in generating universal atomic embeddings through comparisons with current mainstream graph neural network models. Furthermore, we validate the effectiveness of universal atomic embeddings in enhancing the accuracy of model predictions for properties and demonstrate their transferability across different databases and property tasks through various experiments. As another key aspect of our study, we discover the strong physical interpretability implied in universal atomic embeddings through clustering and correlation analysis, indicating the immense potential of our universal atomic embeddings as atomic fingerprints.


Floquet-Engineered Valley-Topotronics in Kekul$\'e\ $- Y Bond Textured Graphene Superlattice. (arXiv:2401.09762v1 [cond-mat.mes-hall])
Sushmita Saha, Alestin Mawrie

The exquisite distortion in a Kekul$\'e\ $-Y (Kek-Y) superlattice merges the two inequivalent Dirac cones (from the $K$- and the $K^\prime$- points) into the highest symmetric $\Gamma$-point in the hexagonal Brillouin zone. Here we report that a circularly polarised light not only opens up a topological gap at the $\Gamma$-point but also lifts the valley degeneracy at that point. Endowed with Floquet dynamics and by devising a scheme of high-frequency approximation, we have proposed that the handedness (left/right) in polarised light offers the possibility to realise the valley-selective circular dichroism in Kek-Y shaped graphene superlattice. Also, the non-vanishing Berry curvature and enumeration of valley resolved Chern number $\mathcal{C}_{K}/\mathcal{C}_{K^\prime}=+1/-1$ enable us to assign two pseudo-spin flavors (up/down) with the two valleys. Thereby, the above observations confirm the topological transition suggesting the ease of realising the valley quantum anomalous Hall (VQAH) state within the photon-dressed Kek-Y. These findings further manifest a non-zero optical valley polarisation which is maximum at the $\Gamma$-point. Our paper thus proposes an optically switchable topological valley filter which is desirous in the evolving landscape of valleytronics.


Magic distances for flat bands in twisted bilayer graphene. (arXiv:2401.09884v1 [cond-mat.mes-hall])
Antonio Palamara, Michele Pisarra, Antonello Sindona

Twisted bilayer graphene is known to host isolated and relatively flat bands near charge neutrality, when tuned to specific magic angles. Nonetheless, these rotational misalignments, lying below 1.1 degrees, result in long-period moir\'e crystals, whose anomalous electronic properties are hardly accessible to reliable atomistic simulations. Here, we present a map of differently stacked graphene sheets, at arbitrary rotation angles corresponding to precise interplanar distances, into an equivalence class represented by magic-angle twisted bilayer graphene. We determine the equivalence relation in the class within a continuum model, and extend its definition to a tight-binding approach. Then, we use density functional theory to suggest that the magic-angle physics may be characterized by costly computational strategies on a twisted bilayer geometry, with conveniently large stacking angles. Our results may pave the way for an ab initio characterization of the unconventional topological phases and related excitations, associated with currently observed low-energy quasi-flat bands.


Extended Hubbard model describing small multi-dot arrays in bilayer graphene. (arXiv:2401.09898v1 [cond-mat.mes-hall])
Angelika Knothe, Guido Burkard

We set up and parametrize a Hubbard model for interacting quantum dots in bilayer graphene and study double dots as the smallest multi-dot system. We demonstrate the tunability of the spin and valley multiplets, Hubbard parameters, and effective exchange interaction by electrostatic gate potentials and the magnetic field. Considering both the long- and short-range Coulomb interaction, we map out the various spin and valley multiplets and calculate their energy gaps for different dot sizes and inter-dot separations. For half-filling and large valley splittings, we derive and parametrize an effective Heisenberg model for the quantum dot spins.


Tip-induced creation and Jahn-Teller distortions of sulfur vacancies in single-layer MoS$_{2}$. (arXiv:2401.09931v1 [cond-mat.mtrl-sci])
Daniel Jansen, Tfyeche Tounsi, Jeison Fischer, Arkady V. Krasheninnikov, Thomas Michely, Hannu-Pekka Komsa, Wouter Jolie

We present an atomically precise technique to create sulfur vacancies and control their atomic configurations in single-layer MoS$_{2}$. It involves adsorbed Fe atoms and the tip of a scanning tunneling microscope, which enables single sulfur removal from the top sulfur layer at the initial position of Fe. Using scanning tunneling spectroscopy, we show that the STM tip can also induce two Jahn-Teller distorted states with reduced orbital symmetry in the sulfur vacancies. Density functional theory calculations rationalize our experimental results. Additionally, we provide evidence for molecule-like hybrid orbitals in artificially created sulfur vacancy dimers, which illustrates the potential of our technique for the development of extended defect lattices and tailored electronic band structures.


Polar self-organization of ferroelectric nematic liquid crystal molecules on atomically flat Au(111) surface. (arXiv:2401.10048v1 [cond-mat.soft])
Alexandr A. Marchenko, Oleksiy L. Kapitanchuk, Yaroslava Yu. Lopatina, Kostiantyn G. Nazarenko, Anton I. Senenko, Nathalie Katsonis, Vassili G. Nazarenko, Oleg D. Lavrentovich

Understanding nanoscale mechanisms responsible for the recently discovered ferroelectric nematics can be helped by direct visualization of self-assembly of strongly polar molecules. Here we report on scanning tunneling microscopy (STM) studies of monomolecular layers of a ferroelectric nematic liquid crystal on a reconstructed Au(111) surface. The monolayers are obtained by deposition from a solution at ambient conditions. The adsorbed ferroelectric nematic molecules self-assemble into regular rows with tilted orientation, resembling a layered structure of a smectic C. Remarkably, each molecular dipole in this architecture is oriented along the same direction giving rise to polar ferroelectric ordering.


Observation of Dirac cones and room temperature polariton lasing in an organic honeycomb lattice. (arXiv:2401.10126v1 [physics.optics])
Simon Betzold (1), Johannes Düreth (1), Marco Dusel (1), Monika Emmerling (1), Antonina Bieganowska (2), Jürgen Ohmer (3), Utz Fischer (3), Sven Höfling (1), Sebastian Klembt (1) ((1) Julius-Maximilians-Universität Würzburg, Physikalisches Institut and Würzburg-Dresden Cluster of Excellence ct.qmat, Lehrstuhl für Technische Physik, Würzburg, Germany, (2) Wroclaw University of Science and Technology, Faculty of Fundamental Problems of Technology, Department of Experimental Physics, Wroclaw, Poland, (3) Julius-Maximilians-Universität Würzburg, Department of Biochemistry, Würzburg, Germany)

Artificial one- and two-dimensional lattices have emerged as a powerful platform for the emulation of lattice Hamiltonians, the fundamental study of collective many-body effects as well as phenomena arising from non-trivial topology. Exciton-polaritons, bosonic part-light and part-matter quasiparticles, combine pronounced nonlinearities with the possibility of on-chip implementation. In this context, organic semiconductors, hosting ultra-stable Frenkel excitons, embedded in a microcavity have proven to be versatile contenders for the study of nonlinear many-body physics and bosonic condensation, which also enable deployment at ambient conditions. Here, we implement a well-controlled, high-quality optical lattice, hosting light-matter quasi-particles. The realized polariton graphene presents with excellent cavity quality factors, showing distinct signatures of Dirac cone and flatband dispersions as well as polariton lasing at room temperature. This is realized by filling coupled dielectric microcavities with the fluorescent protein mCherry. We demonstrate the emergence of a coherent polariton condensate at ambient conditions, profiting from coupling conditions as precise and controllable as in state-of-the-art inorganic semiconductor-based systems, without limitations due to e.g. lattice matching in epitaxial growth. This progress allows straightforward extension to more complex systems, such as the study of topological phenomena in two-dimensional lattices including topological lasers and non-Hermitian optics.


Field-Effect Josephson Diode via Asymmetric Spin-momentum-locking States. (arXiv:2212.01980v4 [cond-mat.mes-hall] UPDATED)
Pei-Hao Fu, Yong Xu, Shengyuan A. Yang, Ching Hua Lee, Yee Sin Ang, Jun-Feng Liu

Recent breakthroughs in Josephson diodes dangle the possibility of extending conventional non-reciprocal electronics into the realm of superconductivity. While a strong magnetic field is recognized for enhancing diode efficiency, it concurrently poses a risk of undermining the essential superconductivity required for non-dissipative devices. To circumvent the need for magnetic-based tuning, we propose a field-effect Josephson diode based on the electrostatic gate control of finite momentum Cooper pairs in asymmetric spin-momentum-locking states. We propose two possible implementations of our gate-controlled mechanism: (i) a topological field-effect Josephson diode in time-reversal-broken quantum spin Hall insulators; and (ii) semiconductor-based field-effect Josephson diodes attainable in current experimental setups involving a Zeeman field and spin-orbit coupling. Notably, the diode efficiency is highly enhanced in the topological field-effect Josephson diode because the current carried by the asymmetric helical edge states is topologically protected and can be tuned by local gates. In the proposed Josephson diode, the combination of gates and asymmetric spin-momentum-locking nature is equivalent to that of a magnetic field, thus providing an alternative electrical operation in designing nonreciprocal superconducting devices.


Kondo Phase in Twisted Bilayer Graphene -- A Unified Theory for Distinct Experiments. (arXiv:2301.04661v4 [cond-mat.str-el] UPDATED)
Geng-Dong Zhou, Yi-Jie Wang, Ninghua Tong, Zhi-Da Song

A number of interesting physical phenomena have been discovered in magic-angle twisted bilayer graphene (MATBG), such as superconductivity, correlated gapped and gapless phases, etc. The gapped phases are believed to be symmetry-breaking states described by mean-field theories, whereas gapless phases exhibit features beyond mean field. This work, combining poor man's scaling, numerical renormalization group, and dynamic mean-field theory, demonstrates that the gapless phases are the heavy Fermi liquid state with some symmetries broken and the others preserved. We adopt the recently proposed topological heavy fermion model for MATBG with effective local orbitals around AA-stacking regions and Dirac fermions surrounding them. At zero temperature and most non-integer fillings, the ground states are found to be heavy Fermi liquids and exhibit Kondo resonance peaks. The Kondo temperature $T_K$ is found at the order of 1meV. A higher temperature than $T_K$ will drive the system into a metallic LM phase where disordered LM's and a Fermi liquid coexist. At integer fillings $\pm1,\pm2$, $T_K$ is suppressed to zero or a value weaker than RKKY interaction, leading to Mott insulators or symmetry-breaking states. This theory offers a unified explanation for several experimental observations, such as zero-energy peaks and quantum-dot-like behaviors in STM, the Pomeranchuk effect, and the saw-tooth feature of inverse compressibility, etc. For future experimental verification, we predict that the Fermi surface in the gapless phase will shrink upon heating - as a characteristic of the heavy Fermi liquid. We also conjecture that the heavy Fermi liquid is the parent state of the observed unconventional superconductivity because the Kondo screening reduces the overwhelming Coulomb interaction (~60meV) to a rather small effective interaction (~1meV) comparable to possible weak attractive interactions.


Metal-insulator transition in transition metal dichalcogenide heterobilayer: accurate treatment of interaction. (arXiv:2306.14954v2 [cond-mat.str-el] UPDATED)
Yubo Yang, Miguel Morales, Shiwei Zhang

Transition metal dichalcogenide superlattices provide an exciting new platform for exploring and understanding a variety of phases of matter. The moir\'e continuum Hamiltonian, of two-dimensional jellium in a modulating potential, provides a fundamental model for such systems. Accurate computations with this model are essential for interpreting experimental observations and making predictions for future explorations. In this work, we combine two complementary quantum Monte Carlo (QMC) methods, phaseless auxiliary field quantum Monte Carlo and fixed-phase diffusion Monte Carlo, to study the ground state of this Hamiltonian. We observe a metal-insulator transition between a paramagnetic and a $120^\circ$ N\'eel ordered state as the moir\'e potential depth and the interaction strength are varied. We find significant differences from existing results by Hartree-Fock and exact diagonalization studies. In addition, we benchmark density-functional theory, and suggest an optimal hybrid functional which best approximates our QMC results.


Power laws of natural swarms are fingerprints of an extended critical region. (arXiv:2309.05064v2 [cond-mat.stat-mech] UPDATED)
R. González-Albaladejo, L. L. Bonilla

Collective biological systems display power laws for macroscopic quantities and are fertile probing grounds for statistical physics. Besides power laws, natural insect swarms present strong scale-free correlations, suggesting closeness to phase transitions. Swarms exhibit {\em imperfect} dynamic scaling: their dynamical correlation functions collapse into single curves when written as functions of the scaled time $t\xi^{-z}$ ($\xi$: correlation length, $z$: dynamic exponent), but only for short times. Triggered by markers, natural swarms are not invariant under space translations. Measured static and dynamic critical exponents differ from those of equilibrium and many nonequilibrium phase transitions. Here, we show that: (i) the recently discovered scale-free-chaos phase transition of the harmonically confined Vicsek model has a novel extended critical region for $N$ (finite) insects that contains several critical lines. (ii) As alignment noise vanishes, there are power laws connecting critical confinement and noise that allow calculating static critical exponents for fixed $N$. These power laws imply that the unmeasurable confinement strength is proportional to the perception range measured in natural swarms. (iii) Observations of natural swarms occur at different times and under different atmospheric conditions, which we mimic by considering mixtures of data on different critical lines and $N$. Unlike results of other theoretical approaches, our numerical simulations reproduce the previously described features of natural swarms and yield static and dynamic critical exponents that agree with observations.


Higher-order Graph Convolutional Network with Flower-Petals Laplacians on Simplicial Complexes. (arXiv:2309.12971v2 [cs.LG] UPDATED)
Yiming Huang, Yujie Zeng, Qiang Wu, Linyuan Lü

Despite the recent successes of vanilla Graph Neural Networks (GNNs) on various tasks, their foundation on pairwise networks inherently limits their capacity to discern latent higher-order interactions in complex systems. To bridge this capability gap, we propose a novel approach exploiting the rich mathematical theory of simplicial complexes (SCs) - a robust tool for modeling higher-order interactions. Current SC-based GNNs are burdened by high complexity and rigidity, and quantifying higher-order interaction strengths remains challenging. Innovatively, we present a higher-order Flower-Petals (FP) model, incorporating FP Laplacians into SCs. Further, we introduce a Higher-order Graph Convolutional Network (HiGCN) grounded in FP Laplacians, capable of discerning intrinsic features across varying topological scales. By employing learnable graph filters, a parameter group within each FP Laplacian domain, we can identify diverse patterns where the filters' weights serve as a quantifiable measure of higher-order interaction strengths. The theoretical underpinnings of HiGCN's advanced expressiveness are rigorously demonstrated. Additionally, our empirical investigations reveal that the proposed model accomplishes state-of-the-art performance on a range of graph tasks and provides a scalable and flexible solution to explore higher-order interactions in graphs. Codes and datasets are available at https://github.com/Yiminghh/HiGCN.


Electrically tuned topology and magnetism in twisted bilayer MoTe$_2$ at $\nu_h=1$. (arXiv:2310.02217v2 [cond-mat.mes-hall] UPDATED)
Bohao Li, Wen-Xuan Qiu, Fengcheng Wu

We present a theoretical study of an interaction-driven quantum phase diagram of twisted bilayer MoTe$_2$ at hole filling factor $\nu_h=1$ as a function of twist angle $\theta$ and layer potential difference $V_z$, where $V_z$ is generated by an applied out-of-plane electric field. At $V_z=0$, the phase diagram includes quantum anomalous Hall insulators in the intermediate $\theta$ regime and topologically trivial multiferroic states with coexisting ferroelectricity and magnetism in both small and large $\theta$ regimes. There can be two transitions from the quantum anomalous Hall insulator phase to topologically trivial out-of-plane ferromagnetic phase, and finally to in-plane 120$^\circ$ antiferromagnetic phase as $|V_z|$ increases, or a single transition without the intervening ferromagnetic phase. We show explicitly that the spin vector chirality of various 120$^\circ$ antiferromagnetic states can be electrically switched. We discuss the connection between the experimentally measured Curie-Weiss temperature and the low-temperature magnetic order based on an effective Heisenberg model with magnetic anisotropy.


Real-space hole-doping titration and manipulation of correlated charge density wave state in 1T-TaS2. (arXiv:2401.01507v2 [cond-mat.str-el] UPDATED)
Haoyu Dong, Yanyan Geng, Jianfeng Guo, Le Lei, Manyu Wang, Yan Li, Li Huang, Fei Pang, Rui Xu, Wei Ji, Hong-Jun Gao, Weichang Zhou, Zhihai Cheng

The complex correlated charge density wave (CDW) phases of 1T-TaS2 have attracted great attention due to their emergent quantum states, such as intricate CDW phase, Mott-Hubbard state, superconductivity and quantum spin liquid. The delicate interplay among the complex intra-/inter-layer electron-electron and electron-lattice interactions is the fundamental prerequisite of these exotic quantum states. Here, we report a real-space titration-like investigation of correlated CDW state in 1T-TaS2 upon hole-doping via low-temperature scanning tunneling microscopy (LT-STM). The gradual increased hole-doping results in the sequential emergence of electron voids, phase domains, stacking disordering and mixed phase/chiral domains attributed to the reduced electron correlations. The achiral intermediate ring-like clusters and nematic CDW states emerge at the intralayer chiral domain wall and interlayer heterochiral stacking regions via the chiral-overlapping configurations. The local reversible CDW manipulation is further realized by the non-equilibrium transient charge-injections of STM field-emission spectra. Our results provide an in-depth insight of this intricate correlated CDW state, and pave a way to realize exotic quantum states via the accurate tuning of interior interactions in correlated materials.


C-R-T Fractionalization, Fermions, and Mod 8 Periodicity. (arXiv:2312.17126v1 [hep-th] CROSS LISTED)
Zheyan Wan, Juven Wang, Shing-Tung Yau, Yi-Zhuang You

Charge conjugation (C), mirror reflection (R), time reversal (T), and fermion parity $(-1)^{\rm F}$ are basic discrete spacetime and internal symmetries of the Dirac fermions. In this article, we determine the group, called the C-R-T fractionalization, which is a group extension of $\mathbb{Z}_2^{\rm C}\times\mathbb{Z}_2^{\rm R}\times\mathbb{Z}_2^{\rm T}$ by the fermion parity $\mathbb{Z}_2^{\rm F}$, and its extension class in all spacetime dimensions $d$, for a single-particle fermion theory. For Dirac fermions, with the canonical CRT symmetry $\mathbb{Z}_2^{\rm CRT}$, the C-R-T fractionalization has two possibilities that only depend on spacetime dimensions $d$ modulo 8, which are order-16 nonabelian groups, including the famous Pauli group. For Majorana fermions, we determine the R-T fractionalization in all spacetime dimensions $d=0,1,2,3,4\mod8$, which is an order-8 abelian or nonabelian group. For Weyl fermions, we determine the C or T fractionalization in all even spacetime dimensions $d$, which is an order-4 abelian group. For Majorana-Weyl fermions, we only have an order-2 $\mathbb{Z}_2^{\rm F}$ group. We discuss how the Dirac and Majorana mass terms break the symmetries C, R, or T. We study the domain wall dimensional reduction of the fermions and their C-R-T fractionalization: from $d$-dim Dirac to $(d-1)$-dim Dirac or Weyl; and from $d$-dim Majorana to $(d-1)$-dim Majorana or Majorana-Weyl.


Found 6 papers in prb
Date of feed: Fri, 19 Jan 2024 04:17:14 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)

Majorana zero modes in multiplicative topological phases
Adipta Pal, Joe H. Winter, and Ashley M. Cook
Author(s): Adipta Pal, Joe H. Winter, and Ashley M. Cook

Topological qubits composed of unpaired Majorana zero modes are under intense experimental and theoretical scrutiny in efforts to realize practical quantum computation schemes. In this work, we show that the minimum four unpaired Majorana zero modes required for a topological qubit according to brai…


[Phys. Rev. B 109, 014516] Published Thu Jan 18, 2024

Anomalous Hall effect in the magnetic Weyl semimetal NdAlGe with plateaus observed at low temperatures
Naoki Kikugawa, Shinya Uji, and Taichi Terashima
Author(s): Naoki Kikugawa, Shinya Uji, and Taichi Terashima

In the $R\mathrm{Al}$(Si,Ge) ($R$: lanthanides) family, both spatial inversion and time-reversal symmetries are broken. This may offer opportunities to study Weyl-fermion physics in nontrivial spin structures emerging from a noncentrosymmetric crystal structure. In this study, we investigated the an…


[Phys. Rev. B 109, 035143] Published Thu Jan 18, 2024

Higher-order topological phase diagram revealed by anomalous Nernst effect in a Janus ScClI monolayer
Ning-Jing Yang and Jian-Min Zhang
Author(s): Ning-Jing Yang and Jian-Min Zhang

Higher-order topological properties of two-dimensional (2D) magnetic materials have recently been proposed. In 2D ferromagnetic Janus materials, we find that ScClI is a second-order topological insulator. Using the tight-binding approximation, we develop a multiorbital model that adequately describe…


[Phys. Rev. B 109, 035423] Published Thu Jan 18, 2024

Real-space topological localizer index to fully characterize the dislocation skin effect
Nisarg Chadha, Ali G. Moghaddam, Jeroen van den Brink, and Cosma Fulga
Author(s): Nisarg Chadha, Ali G. Moghaddam, Jeroen van den Brink, and Cosma Fulga

The dislocation skin effect exhibits the capacity of topological defects to trap an extensive number of modes in two-dimensional non-Hermitian systems. Similar to the corresponding skin effects caused by system boundaries, this phenomenon also originates from nontrivial topology. However, finding th…


[Phys. Rev. B 109, 035425] Published Thu Jan 18, 2024

Rashba spin splitting based on trilayer graphene systems
Xinjuan Cheng, Liangyao Xiao, and Xuechao Zhai
Author(s): Xinjuan Cheng, Liangyao Xiao, and Xuechao Zhai

We establish a general Rashba Hamiltonian for trilayer graphene (TLG) by introducing an extrinsic layer-dependent Rashba spin-orbit coupling (SOC) arising from the off-plane inversion symmetry breaking. Our results indicate that the band spin splitting depends strongly on the layer distribution and …


[Phys. Rev. B 109, 035426] Published Thu Jan 18, 2024

Topological phase transitions captured in the set of reduced density matrices
Samuel Warren, LeeAnn M. Sager-Smith, and David A. Mazziotti
Author(s): Samuel Warren, LeeAnn M. Sager-Smith, and David A. Mazziotti

Topological phase transitions fall outside of the symmetry-breaking paradigm and therefore elude many traditional analytical methods. In particular, significant geometric features found in the set of reduced density matrices (RDMs) disappear in symmetry-preserving topological systems. By returning t…


[Phys. Rev. B 109, 045134] Published Thu Jan 18, 2024

Found 5 papers in prl
Date of feed: Fri, 19 Jan 2024 04:17:13 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]+)|(flatband)|(flat.{1}band)|(LK.{1}99)

Exact Operator Map from Strong Coupling to Free Fields: Beyond Seiberg-Witten Theory
Chinmaya Bhargava, Matthew Buican, and Hongliang Jiang
Author(s): Chinmaya Bhargava, Matthew Buican, and Hongliang Jiang

In quantum field theory above two spacetime dimensions, one is usually only able to construct exact operator maps from UV to IR of strongly coupled renormalization group flows for the most symmetry-protected observables. Famous examples include maps of chiral rings in 4D $\mathcal{N}=2$ supersymmetr…


[Phys. Rev. Lett. 132, 031602] Published Thu Jan 18, 2024

Topological Constraints on the Dynamics of Vortex Formation in a Two-Dimensional Quantum Fluid
T. Congy, P. Azam, R. Kaiser, and N. Pavloff
Author(s): T. Congy, P. Azam, R. Kaiser, and N. Pavloff

We present experimental and theoretical results on formation of quantum vortices in a laser beam propagating in a nonlinear medium. Topological constrains richer than the mere conservation of vorticity impose an elaborate dynamical behavior to the formation and annihilation of vortex-antivortex pair…


[Phys. Rev. Lett. 132, 033804] Published Thu Jan 18, 2024

Experimental Evidence of Plasmoids in High-$β$ Magnetic Reconnection
J. A. Pearcy, M. J. Rosenberg, T. M. Johnson, G. D. Sutcliffe, B. L. Reichelt, J. D. Hare, N. F. Loureiro, R. D. Petrasso, and C. K. Li
Author(s): J. A. Pearcy, M. J. Rosenberg, T. M. Johnson, G. D. Sutcliffe, B. L. Reichelt, J. D. Hare, N. F. Loureiro, R. D. Petrasso, and C. K. Li

Magnetic reconnection is a ubiquitous and fundamental process in plasmas by which magnetic fields change their topology and release magnetic energy. Despite decades of research, the physics governing the reconnection process in many parameter regimes remains controversial. Contemporary reconnection …


[Phys. Rev. Lett. 132, 035101] Published Thu Jan 18, 2024

Emergence of Competing Orders and Possible Quantum Spin Liquid in $\mathrm{SU}(N)$ Fermions
Xue-Jia Yu, Shao-Hang Shi, Limei Xu, and Zi-Xiang Li
Author(s): Xue-Jia Yu, Shao-Hang Shi, Limei Xu, and Zi-Xiang Li

A realistic SU(N) interacting fermionic model reveals exotic quantum magnetic phases that occur at intermediate N, where the competition between distinct ordering tendencies gives rise to an intermediate quantum spin liquid phase featuring nontrivial topological order.


[Phys. Rev. Lett. 132, 036704] Published Thu Jan 18, 2024

Percolation and Topological Properties of Temporal Higher-Order Networks
Leonardo Di Gaetano, Federico Battiston, and Michele Starnini
Author(s): Leonardo Di Gaetano, Federico Battiston, and Michele Starnini

A hidden-variable formalism allows for the characterization of topological properties of temporal networks with higher-order interactions.


[Phys. Rev. Lett. 132, 037401] Published Thu Jan 18, 2024

Found 2 papers in pr_res
Date of feed: Fri, 19 Jan 2024 04:17:15 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)

Diminishing topological Faraday effect in thin layer samples
Christian Berger, Florian Bayer, Laurens W. Molenkamp, and Tobias Kiessling
Author(s): Christian Berger, Florian Bayer, Laurens W. Molenkamp, and Tobias Kiessling

A striking feature of three-dimensional (3D) topological insulators (TIs) is the theoretically expected topological magnetoelectric (TME) effect, which gives rise to additional terms in Maxwell's laws of electromagnetism with an universal quantized coefficient proportional to half-integer multiples …


[Phys. Rev. Research 6, 013068] Published Thu Jan 18, 2024

Particle-resolved study of the onset of turbulence
E. Joshi, M. H. Thoma, and M. Schwabe
Author(s): E. Joshi, M. H. Thoma, and M. Schwabe

The onset of turbulence is studied at the particle-resolved level using three-dimensional molecular dynamics simulations of micrometer-sized “dust” particles embedded in a plasma environment, also known as a complex plasma. Turbulence is triggered by simulating a flow of microparticles past an obstacle while controlling parameters such as the flow speed and particle charge with and without the presence of damping. It is found that turbulence in simulations with damping occurs after the formation of shock fronts and that the transition to turbulence follows the conventional pathway involving the intermittent emergence of turbulent puffs.


[Phys. Rev. Research 6, L012013] Published Thu Jan 18, 2024

Found 2 papers in nano-lett
Date of feed: Thu, 18 Jan 2024 14:05:07 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] Dephasing Dynamics Accessed by High Harmonic Generation: Determination of Electron–Hole Decoherence of Dirac Fermions
Youngjae Kim, Min Jeong Kim, Soonyoung Cha, Shinyoung Choi, Cheol-Joo Kim, B. J. Kim, Moon-Ho Jo, Jonghwan Kim, and JaeDong Lee

TOC Graphic

Nano Letters
DOI: 10.1021/acs.nanolett.3c04278

[ASAP] Manipulations of Electronic and Spin States in Co-Quantum Dot/WS2 Heterostructure on a Metal-Dielectric Composite Substrate by Controlling Interfacial Carriers
Zongnan Zhang, Weiqing Tang, Jiajun Chen, Yuxiang Zhang, Chenhao Zhang, Mingming Fu, Feihong Huang, Xu Li, Chunmiao Zhang, Zhiming Wu, Yaping Wu, and Junyong Kang

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Nano Letters
DOI: 10.1021/acs.nanolett.3c04831

Found 2 papers in acs-nano
Date of feed: Thu, 18 Jan 2024 14:02:56 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] Chemical Vapor Deposition of a Single-Crystalline MoS2 Monolayer through Anisotropic 2D Crystal Growth on Stepped Sapphire Surface
Iryna Kandybka, Benjamin Groven, Henry Medina Silva, Stefanie Sergeant, Ankit Nalin Mehta, Serkan Koylan, Yuanyuan Shi, Sreetama Banerjee, Pierre Morin, and Annelies Delabie

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ACS Nano
DOI: 10.1021/acsnano.3c09364

[ASAP] Constructing a Topologically Adaptable Solid Electrolyte Interphase for a Highly Reversible Zinc Anode
Tong Yan, Sucheng Liu, Jinye Li, Mengli Tao, Jinhui Liang, Li Du, Zhiming Cui, and Huiyu Song

TOC Graphic

ACS Nano
DOI: 10.1021/acsnano.3c11743