A5061455084- 2D Materials and Applications
- Graphene research and applications
- Topological Materials and Phenomena
- Perovskite Materials and Applications
- Quantum and electron transport phenomena
- Molecular Junctions and Nanostructures
- MXene and MAX Phase Materials
- Electronic and Structural Properties of Oxides
- Crystallization and Solubility Studies
- Semiconductor Quantum Structures and Devices
- X-ray Diffraction in Crystallography
- Chalcogenide Semiconductor Thin Films
- Mycorrhizal Fungi and Plant Interactions
- Carbon Nanotubes in Composites
- Shape Memory Alloy Transformations
- Nanowire Synthesis and Applications
- Machine Learning in Materials Science
- Photonic and Optical Devices
- Graphene and Nanomaterials Applications
- Mechanical and Optical Resonators
- Quantum Dots Synthesis And Properties
- Physics of Superconductivity and Magnetism
- Advanced Condensed Matter Physics
- Multiferroics and related materials
- Lichen and fungal ecology
University of Washington
2019-2025
Xinjiang Institute of Ecology and Geography
2023-2024
Chinese Academy of Sciences
2009-2024
University of Chinese Academy of Sciences
2010-2024
First Affiliated Hospital Zhejiang University
2024
Institute of Physics
2022-2023
Zhejiang Lab
2022-2023
Institute of Applied Ecology
2018-2022
Peking University
2011-2022
Stanford University
2019-2021
A two-dimensional honeycomb lattice harbors a pair of inequivalent valleys in the k-space electronic structure, vicinities vertices hexagonal Brillouin zone, K}$_{\pm}$. It is particularly appealing to exploit this emergent degree freedom charge carriers, what termed "valleytronics", if carrier imbalance between can be achieved. The physics valley polarization will make possible devices such as filter and valve, optoelectronic Hall devices, all very promising for next-generation...
We find, through first-principles calculations, that hole doping induces a ferromagnetic phase transition in monolayer GaSe. Upon increasing density, the average spin magnetic moment per carrier increases and reaches plateau near 1.0 μB range of 3×10(13)/cm(2)-1×10(14)/cm(2), with system half-metal state before starts to descend abruptly. The predicted itinerant magnetism originates from an exchange splitting electronic states at top valence band, where density exhibits sharp van Hove...
Nonlinear effects in two-dimensional (2D) atomic layered materials have recently attracted increasing interest. Phenomena such as nonlinear optical edge response, chiral electroluminescence, and valley spin currents beyond linear orders opened up a great opportunity to expand the functionalities potential applications of 2D materials. Here we report first observation strong second-harmonic generation (SHG) monolayer GaSe under nonresonant excitation emission condition. Our experiments show...
Conventional electronics are based invariably on the intrinsic degrees of freedom an electron, namely its charge and spin. The exploration novel electronic has important implications in both basic quantum physics advanced information technology. Valley, as a new degree freedom, received considerable attention recent years. In this paper, we develop theory spin valley antiferromagnetic honeycomb lattice. We show that by coupling to order, there is emergent characterized product indices, which...
We show that semiconducting graphene nanoribbons (GNRs) of different width, edge, and end termination (synthesizable from molecular precursors with atomic precision) belong to electronic topological classes. The phase GNRs is protected by spatial symmetries dictated the terminating unit cell. have derived explicit formulas for their invariants shown localized junction states developed between two distinct topology may be tuned lateral geometry. a GNR can further modified dopants, such as...
Exciton dispersion as a function of center-of-mass momentum Q is essential to the understanding exciton dynamics. We use ab initio GW-Bethe-Salpeter equation method calculate excitons in monolayer MoS(2) and find nonanalytic lightlike dispersion. This behavior arises from an unusual |Q|-term both intra- intervalley exchange electron-hole interaction, which concurrently gives rise valley quantum phase winding number two. A simple effective Hamiltonian Q(2) order with analytic solutions...
Moiré superlattices of twisted nonmagnetic two-dimensional (2D) materials are highly controllable platforms for the engineering exotic correlated and topological states. Here, we report emerging magnetic textures in small-angle 2D magnet chromium triiodide (CrI3). Using single-spin quantum magnetometry, directly visualized nanoscale domains periodic patterns, a signature moiré magnetism, measured domain size magnetization. In bilayer CrI3, observed coexistence antiferromagnetic (AFM)...
A fundamental requirement for the development of advanced electronic device architectures based on graphene nanoribbon (GNR) technology is ability to modulate band structure and charge carrier concentration by substituting specific carbon atoms in hexagonal lattice with p- or n-type dopant heteroatoms. Here we report atomically precise introduction group III into bottom-up fabricated semiconducting armchair GNRs (AGNRs). Trigonal-planar B along backbone GNR share an empty p-orbital extended...
We report the experimental discovery of intrinsic ferromagnetism in Cr2Ge2Te6 atomic layers by scanning magneto-optic Kerr microscopy. In this 2D van der Waals ferromagnet, unprecedented control transition temperature is realized via small magnetic fields.
The design and fabrication of robust metallic states in graphene nanoribbons (GNRs) are challenging because lateral quantum confinement many-electron interactions induce electronic band gaps when is patterned at nanometer length scales. Recent developments bottom-up synthesis have enabled the characterization atomically precise GNRs, but strategies for realizing GNR metallicity been elusive. Here we demonstrate a general technique inducing GNRs by inserting symmetric superlattice zero-energy...
A recent experiment has reported the first observation of a zero-field fractional Chern insulator (FCI) phase in twisted bilayer ${\mathrm{MoTe}}_{2}$ moir\'e superlattices [J. Cai et al., Signatures quantum anomalous Hall states ${\mathrm{MoTe}}_{2}$, Nature (London) 622, 63 (2023).]. The experimental is at an unexpected large twist angle 3.7\ifmmode^\circ\else\textdegree\fi{} and calls for better understanding FCI real materials. In this Letter, we perform large-scale density functional...