A5035476293- Topological Materials and Phenomena
- Graphene research and applications
- 2D Materials and Applications
- Advanced Condensed Matter Physics
- Speech and Audio Processing
- Music and Audio Processing
- Speech Recognition and Synthesis
- Protein Interaction Studies and Fluorescence Analysis
- Electronic and Structural Properties of Oxides
- Quantum and electron transport phenomena
- Blind Source Separation Techniques
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Magnetic and transport properties of perovskites and related materials
- Advanced Thermoelectric Materials and Devices
- Chalcogenide Semiconductor Thin Films
- Advanced Adaptive Filtering Techniques
- Ga2O3 and related materials
- Spectroscopy and Laser Applications
- Spectroscopy Techniques in Biomedical and Chemical Research
- Methemoglobinemia and Tumor Lysis Syndrome
- Magnetic properties of thin films
- Iron-based superconductors research
- Organic and Molecular Conductors Research
- Physics of Superconductivity and Magnetism
ShanghaiTech University
2020-2025
University of Science and Technology of China
2025
State Key Laboratory of Pollution Control and Resource Reuse
2025
Tongji University
2025
Nanchang University
2023-2024
University of Oxford
2018-2023
Tsinghua University
2001-2021
AREA Science Park
2021
Max Planck Institute for Chemical Physics of Solids
2021
Diamond Light Source
2021
Weyl semimetals are crystalline solids that host emergent relativistic fermions and have characteristic surface Fermi-arcs in their electronic structure. with broken time reversal symmetry difficult to identify unambiguously. In this work, using angle-resolved photoemission spectroscopy, we visualized the structure of ferromagnetic crystal Co3Sn2S2 discovered its linear bulk band dispersions across points. These results establish as a magnetic semimetal may serve platform for realizing...
A new layered oxide semiconductor (Bi 2 O Se) is found with excellent electronic properties for promising applications.
It has recently been proposed that combining chirality with topological band theory results in a totally new class of fermions. Understanding how these unconventional quasiparticles propagate and interact remains largely unexplored so far. Here, we use scanning tunneling microscopy to visualize the electronic properties prototypical chiral semimetal PdGa. We reveal quantum interference patterns opposite spiraling directions for two PdGa enantiomers, direct manifestation change sign their...
Topological semimetals feature protected nodal band degeneracies characterized by a topological invariant known as the Chern number (C). Nodal crossings with linear dispersion are expected to have at most |C|=4, which sets an upper limit magnitude of many phenomena in these materials. Here we show that chiral crystal PdGa displays multifold crossings, connected exactly four surface Fermi-arcs, thus proving they carry maximal 4. By comparing two enantiomers, observe reversal their Fermi-arc...
Abstract Twisted bilayer graphene (tBLG) has recently attracted growing interest due to its unique twist-angle-dependent electronic properties. The preparation of high-quality large-area with rich rotation angles would be important for the investigation angle-dependent physics and applications, which, however, is still challenging. Here, we demonstrate a chemical vapor deposition (CVD) approach tBLG using hetero-site nucleation strategy, which enables second layer at different site from that...
Twisted bilayer graphene provides a new two-dimensional platform for studying electron interaction phenomena and flat band properties such as correlated insulator transition, superconductivity ferromagnetism at certain magic angles.
Topological superconductors (TSCs) are unconventional with bulk superconducting gap and in-gap Majorana states on the boundary that may be used as topological qubits for quantum computation. Despite their importance in both fundamental research applications, natural TSCs very rare. Here, combining state of art synchrotron laser-based angle-resolved photoemission spectroscopy, we investigated a stoichiometric transition metal dichalcogenide (TMD), 2M-WS2 temperature 8.8 K (the highest among...
Abstract The unusual properties of superconductivity in magic-angle twisted bilayer graphene (MATBG) have sparked considerable research interest 1–13 . However, despite the dedication intensive experimental efforts and proposal several possible pairing mechanisms 14–24 , origin its remains elusive. Here, by utilizing angle-resolved photoemission spectroscopy with micrometre spatial resolution, we reveal flat-band replicas superconducting MATBG, where MATBG is unaligned hexagonal boron...
Twisted van der Waals heterostructures have recently been proposed as a condensed-matter platform for realizing controllable quantum models due to the low-energy moir\'e bands with specific charge distributions in superlattices. Here, combining angle-resolved photoemission spectroscopy sub-micron spatial resolution ({\mu}-ARPES) and scanning tunneling microscopy (STM), we performed systematic investigation on electronic structure of 5.1{\deg} twisted bilayer WSe2 that hosts correlated...
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...
Crystal geometry can greatly influence the emergent properties of quantum materials. As an example, kagome lattice is ideal platform to study rich interplay between topology, magnetism, and electronic correlation. In this work, combining high-resolution angle-resolved photoemission spectroscopy ab initio calculation, we systematically investigate structure $X{\mathrm{Mn}}_{6}{\mathrm{Sn}}_{6}$ $(X=\mathrm{Dy},\mathrm{Tb},\mathrm{Gd},\mathrm{Y})$ family compounds. We observe Dirac fermion...
Moir\'e superlattices that consist of two or more layers two-dimensional materials stacked together with a small twist angle have emerged as tunable platform to realize various correlated and topological phases, such Mott insulators, unconventional uperconductivity quantum anomalous Hall effect. Recently, the magic-angle twisted trilayer graphene (MATTG) has shown both robust superconductivity similar bilayer (MATBG) other unique properties, including Pauli-limit violating re-entrant...
In the relentless pursuit of quantum computational advantage, we present a significant advancement with development Zuchongzhi 3.0. This superconducting computer prototype, comprising 105 qubits, achieves high operational fidelities, single-qubit gates, two-qubit and readout fidelity at 99.90%, 99.62%, 99.13%, respectively. Our experiments an 83-qubit, 32-cycle random circuit sampling on 3.0 highlight its superior performance, achieving 1×10^{6} samples in just few hundred seconds. task is...
In view of the fact that statistical feature quantity traditional partial discharge (PD) pattern recognition relies on expert experience and lacks certain generalization, this paper develops PD based convolutional neural network (cnn) long-term short-term memory (lstm). Firstly, we constructed cnn-lstm model, which combines advantages cnn in mining local spatial information spectrum lstm time series information. Then, transformer UHF (Ultra High Frequency) experiment was carried out. The...
Abstract The notion of topological insulators (TIs), characterized by an insulating bulk and conducting surface states, can be extended to higher-order (HOTIs) hosting gapless modes localized at the boundaries two or more dimensions lower than bulk. In this work, performing high-resolution angle-resolved photoemission spectroscopy (ARPES) measurements with submicron spatial spin resolution, we systematically investigate electronic structure texture quasi-one-dimensional (1D) HOTI candidate...
Pyrite CoS 2 , which was long studied as a potential half-metal, is shown to be magnetic Weyl semimetal.
(Quasi-)one-dimensional systems exhibit various fascinating properties such as Luttinger liquid behavior, Peierls transition, novel topological phases, and the accommodation of unique quasiparticles (e.g., spinon, holon, soliton, etc.). Here we study molybdenum blue bronze A0.3MoO3 (A = K, Rb), a canonical quasi-one-dimensional charge-density-wave material, using laser-based angle-resolved photoemission spectroscopy. Our experiment suggests that normal phase is prototypical liquid, from...