A5062282643- Topological Materials and Phenomena
- Graphene research and applications
- Advanced Condensed Matter Physics
- 2D Materials and Applications
- Electronic and Structural Properties of Oxides
- Iron-based superconductors research
- Rare-earth and actinide compounds
- Cold Atom Physics and Bose-Einstein Condensates
- Physics of Superconductivity and Magnetism
- Magnetic and transport properties of perovskites and related materials
- Atomic and Subatomic Physics Research
- Quantum many-body systems
- Quantum and electron transport phenomena
- Magnetic properties of thin films
- Advanced Chemical Physics Studies
- Perovskite Materials and Applications
- Acute Ischemic Stroke Management
- Magnetic Properties of Alloys
- Generative Adversarial Networks and Image Synthesis
- Semiconductor Quantum Structures and Devices
- Inorganic Chemistry and Materials
- Cerebrovascular and Carotid Artery Diseases
- Machine Learning in Materials Science
- Geological Modeling and Analysis
- Human Motion and Animation
Zhejiang University
2022-2025
Xuzhou Medical College
2021-2025
Jiangsu University
2021-2025
Princeton University
2021-2025
Sun Yat-sen University
2025
Max Planck Institute of Microstructure Physics
2019-2024
Massachusetts Institute of Technology
2023
Dalian University of Technology
2022
Institute of Physics
2017-2021
University of Chinese Academy of Sciences
2017-2021
The origin of anomalous Hall effect (AHE) in magnetic materials is one the most intriguing aspect condensed matter physics and has been controversial for a long time. Recent studies indicate that intrinsic AHE closely related to Berry curvature occupied electronic states. In Weyl semimetal with broken time-reversal symmetry, there are significant contributions on around nodes, which would lead large AHE. Here, we report half-metallic ferromagnet Co3Sn2S2 single crystal. By systematically...
Based on first-principles calculations and symmetry analysis, we propose that EuIn_{2}As_{2} is a long-awaited axion insulator with antiferromagnetic (AFM) long-range order. Characterized by the parity-based invariant Z_{4}=2, topological magnetoelectric effect quantized θ=π in bulk, band gap as large 0.1 eV. When staggered magnetic moments of AFM phase are along or b axis, it also crystalline gapless surface states emerging (100), (010), (001) surfaces. c both (100) surfaces gapped,...
In magnetic topological insulators (TIs), the interplay between order and nontrivial topology can induce fascinating quantum phenomena, such as anomalous Hall effect, chiral Majorana fermions axion electrodynamics. Recently, a great deal of attention has been focused on intrinsic TIs, where disorder effects be eliminated to large extent, which is expected facilitate emergence phenomena. despite intensive efforts, experimental evidence surface states (SSs) remains elusive. Here, by combining...
For over 100 years, the group-theoretic characterization of crystalline solids has provided foundational language for diverse problems in physics and chemistry. However, group theory crystals with commensurate magnetic order remained incomplete past 70 due to complicated symmetries crystals. In this work, we complete 100-year-old problem by deriving small corepresentations, momentum stars, compatibility relations, elementary band corepresentations 1,421 space groups (MSGs), which have made...
Phonons play a crucial role in many properties of solid-state systems, and it is expected that topological phonons may lead to rich unconventional physics. On the basis existing phonon materials databases, we have compiled catalog bands for more than 10,000 three-dimensional crystalline materials. Using quantum chemistry, calculated band representations, compatibility relations, topologies each isolated set databases. Additionally, real-space invariants all topologically trivial classified...
Altermagnetism, a kind of collinear magnetism that is characterized by momentum-dependent band and spin splitting without net magnetization, has recently attracted considerable interest. Finding altermagnetic materials with large near the Fermi level necessarily requires three-dimensional k-space mapping. While this crucial for spintronic applications emergent phenomena, it remains challenging. Here, using synchrotron-based angle-resolved photoemission spectroscopy (ARPES), spin-resolved...
Abstract Parity‐time symmetry plays an essential role for the formation of Dirac states in semimetals. So far, all experimentally identified topologically nontrivial semimetals (DSMs) possess both parity and time reversal symmetry. The realization magnetic topological DSMs remains a major issue material research. Here, combining angle‐resolved photoemission spectroscopy with density functional theory calculations, it is ascertained that band inversion induces ground state EuCd 2 As . result,...
The discovery of new catalysts that are efficient and sustainable is a major research endeavor for many industrial chemical processes. This requires an understanding determination the catalytic origins, which remains challenge. Here, novel method to identify position active sites based on searching crystalline symmetry-protected obstructed atomic insulators (OAIs) have metallic surface states described. Wannier charge centers (OWCCs) in OAIs pinned by symmetries at some empty Wyckoff...
Topological band theory has achieved great success in the high-throughput search for topological structures both paramagnetic and magnetic crystal materials. However, a significant proportion of materials are topologically trivial insulators at Fermi level. In this paper, we show that, remarkably, subset insulators, knowing only their electron number Wyckoff positions atoms can separate them into two groups: obstructed atomic insulator (OAI) (AI). The interesting group, OAI, have center...
Topological flat bands, such as the band in twisted bilayer graphene, are becoming a promising platform to study topics correlation physics, superconductivity, and transport. In this work, we introduce generic approach construct two-dimensional (2D) topological quasi-flat bands from line graphs split of bipartite lattices. A graph or lattice exhibits set dispersive bands. The connects through degenerate state at some momentum. We find that, with spin-orbit coupling (SOC), becomes gapped By...
Abstract Here we investigate antiferromagnetic Eu 5 In 2 Sb 6 , a nonsymmorphic Zintl phase. Our electrical transport data show that is remarkably insulating and exhibits an exceptionally large negative magnetoresistance, which consistent with the presence of magnetic polarons. From ab initio calculations, paramagnetic state topologically nontrivial semimetal within generalized gradient approximation (GGA), whereas trivial topological indices obtained using modified Becke−Johnson potential....
Topological phases in electronic structures contain a new type of topology, called fragile, which can arise, for example, when an Elementary Band Representation (Atomic Limit Band) splits into particular set bands. We obtain, the first time, complete classification fragile topological be diagnosed by symmetry eigenvalues, to find incredibly rich structure far surpasses that stable/strong states. and enumerate all hundreds thousands different eigenvalues (available at...
Abstract The spin–orbit coupling (SOC) lifts the band degeneracy that plays a vital role in search for different topological states, such as insulators (TIs) and semimetals (TSMs). In TSMs, SOC can partially gap degenerate nodal line, leading to formation of Dirac/Weyl (DSMs/WSMs). However, SOC-induced structure along line TSMs has not yet been systematically investigated experimentally. Here, we report direct observation magnetic WSM Co 3 Sn 2 S using high-resolution angle-resolved...
Quantum spin-Hall insulators (QSHIs) possess nontrivial band topology. Using first-principles many-body perturbation theory ($GW+\text{Bathe-Salpeter}$ equation), we show that excitonic (EIs) can exist in QSHIs AsO and ${\mathrm{Mo}}_{2}{\mathrm{TiC}}_{2}{\mathrm{O}}_{2}$ with nonvanishing gaps. Their single-particle topological properties be described by the same low-energy model, EI phase this model is of spin-triplet type due to geometry. The rotational symmetry broken $s$-wave order...
The presence of topological flat minibands in moiré materials provides an opportunity to explore the interplay between topology and correlation. In this work, we study insulator films with two hybridized surface states under a superlattice potential created by two-dimensional insulating materials. We show lowest conduction (highest valence) Kramers' pair can be Z2 non-trivial when minima (maxima) approximately form hexagonal lattice six-fold rotation symmetry. Coulomb interaction drive into...
Weyl semimetals have highly mobile charged particles that may make them useful in electronic devices, but only a few of been identified thus far. Computational analysis reveals the compound CeRu${}_{4}$Sn${}_{6}$ exhibits Weyl-like behavior and be new type material known as heavy fermion state.
Objective Parkinson’s disease is a common neurodegenerative disease. Here, we investigated the protective effect and potential mechanisms of propionate on intestinal epithelial barrier in mice with 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP)-induced Methods Gas chromatography was used to determine short-chain fatty acids (SCFA) concentrations fecal samples patients healthy controls. The stepping test analyze forelimb akinesia, whisker sensorimotor injury, cylinder function, Western...