A5100357605- Physics of Superconductivity and Magnetism
- Quantum and electron transport phenomena
- Topological Materials and Phenomena
- Iron-based superconductors research
- Advanced Condensed Matter Physics
- Gyrotron and Vacuum Electronics Research
- Graphene research and applications
- Advanced Fiber Laser Technologies
- Pulsed Power Technology Applications
- Rare-earth and actinide compounds
- Magnetic properties of thin films
- Microwave Engineering and Waveguides
- 2D Materials and Applications
- Theoretical and Computational Physics
- Semiconductor Quantum Structures and Devices
- Mechanical and Optical Resonators
- Magnetic and transport properties of perovskites and related materials
- Photonic and Optical Devices
- Phase-change materials and chalcogenides
- Corporate Taxation and Avoidance
- Force Microscopy Techniques and Applications
- Optical and Acousto-Optic Technologies
- Cold Atom Physics and Bose-Einstein Condensates
- Advanced Physical and Chemical Molecular Interactions
- Photonic Crystal and Fiber Optics
Shanxi Normal University
2023-2025
National High Magnetic Field Laboratory
2020-2024
Hefei Cement Research Design Institute
2024
Qingdao University
2024
Peking University
2023
Beijing Graphene Institute
2023
Taiyuan University of Technology
2023
Henan University
2023
South China Normal University
2023
Florida State University
2022
Anisotropic hopping in a toy Hofstadter model was recently invoked to explain rich and surprising Landau spectrum measured twisted bilayer graphene away from the magic angle. Suspecting that such anisotropy could arise unintended uniaxial strain, we extend Bistritzer–MacDonald include heterostrain present detailed analysis of its impact on band structure magnetotransport. We find strain strongly influences structure, shifting three otherwise-degenerate van Hove points different energies....
Electrical transport properties near an electronic Ising-nematic quantum critical point in two dimensions are of both theoretical and experimental interest. In this work, we derive a kinetic equation valid broad regime the using memory matrix approach. The formalism is applied to study effect fluctuations on dc resistivity through different scattering mechanisms, including umklapp, impurity scattering, electron-hole compensated metal. We show that electrical exhibits rich behavior depends...
In several unconventional superconductors, the highest superconducting transition temperature ${T}_{c}$ is found in a region of phase diagram where antiferromagnetic extrapolates to zero, signaling putative quantum critical point. The elucidation interplay between these two phenomena---high-${T}_{c}$ superconductivity and magnetic criticality---remains an important piece complex puzzle superconductivity. this paper, we combine sign-problem-free Monte Carlo simulations field-theoretical...
Most iron-based superconductors undergo a transition to magnetically ordered state characterized by staggered stripes of parallel spins. With ordering vectors $(\pi,0)$ or $(0,\pi)$, this magnetic breaks the high-temperature tetragonal symmetry system, which is manifested splitting lattice Bragg peaks. Remarkably, recent experiments in hole-doped iron arsenides reported an that displays peaks at and $(0,\pi)$ but remains tetragonal. Despite being inconsistent with stripe configuration,...
We develop a new, efficient, and general method to determine the Hofstadter spectrum of isolated narrow bands. The works for topological as well trivial bands by projecting zero $\mathbf{B}$-field hybrid Wannier states -- which are localized in one direction Bloch extended another onto representation magnetic translation group Landau gauge. then apply this find, first time, exact single particle charged excitations strong coupling limit magic angle twisted bilayer graphene at charge...
Motivated by experiments in ${\mathrm{Ba}}_{1\ensuremath{-}x}{\mathrm{K}}_{x}{\mathrm{Fe}}_{2}{\mathrm{As}}_{2}$ [A. E. B\"ohmer et al., arXiv:1412.7038], we analyze the type of spin-density wave (SDW) order doped iron-pnictides and discontinuities superconducting transition temperature ${T}_{c}$ coexistence phase with SDW magnetism. We find a sequence transitions, upon lowering temperature, from stripe-orthorhombic $({C}_{2})$ to tetragonal $({C}_{4})$ then back ${C}_{2}$ order. argue that...
Abstract We generated transgenic mice expressing firefly ( Photinus pyralis ) luciferase luc under the control of mouse insulin I promoter (MIP). The have normal glucose tolerance and pancreatic islet architecture. luciferase‐expressing beta cells can be readily visualized in living using whole‐body bioluminescent imaging. MIP‐ may useful for monitoring changes cell function or mass animals with altered metabolic states. genesis 43:80–86, 2005. © 2005 Wiley‐Liss, Inc.
The discovery of a vestigial nematic electronic phase in CeAuSb${}_{2}$ without superconductivity reveals the complex interplay between this and stripe magnetic order how relates to high-temperature superconductivity.
We investigate the interplay between charge order and superconductivity near an antiferromagnetic quantum critical point using sign-problem-free Quantum Monte Carlo simulations. establish that, when electronic dispersion is particle-hole symmetric, system has emergent SU(2) symmetry that implies a degeneracy d-wave with form factor. Deviations from symmetry, however, rapidly lift this degeneracy, despite fact preserved at low energies. As result, we find strong suppression of caused by...
Recent Raman scattering experiments have revealed a quasielastic peak in ${\mathrm{FeSe}}_{1\ensuremath{-}\mathrm{x}}{\mathrm{S}}_{\mathrm{x}}$ near an Ising-nematic quantum critical point (QCP) [Zhang et al., PNAS 118, 20 (2021)]. Notably, the occurs at subtemperature frequencies, and softens as ${T}^{\ensuremath{\alpha}}$ when temperature is decreased toward QCP, with $\ensuremath{\alpha}>1$. This dependence inconsistent impurity scenario, suggests that fluctuations play important role....
We investigate the fate of orthorhombic stripe-type magnetic state (ordering vectors $\left(\pi,0\right)$/$\left(0,\pi\right)$), observed in most iron-pnictide superconductors, presence localized moments that tend to form a Neel vector $\left(\pi,\pi\right)$). show before long-range order sets in, coupling between conduction electrons and fluctuations local favors an unusual consisting coherent superposition $\left(\pi,0\right)$ $\left(0,\pi\right)$ orders preserves tetragonal symmetry. The...
Incorporating relativistic physics into quantum tunneling can lead to exotic behavior such as perfect transmission via Klein tunneling. Here, we probe the properties of spin-momentum locked fermions by designing and implementing a geometry that utilizes nanowires topological Kondo insulator candidate, SmB6. The are attached end scanning microscope tips, used image bicollinear stripe spin-order in antiferromagnet Fe1.03Te with Neel temperature ~50 K. antiferromagnetic stripes become invisible...
Magic-angle twisted bilayer graphene is the best-studied physical platform featuring moiré potential-induced narrow bands with nontrivial topology and strong electronic correlations. Despite their significance, Chern insulating states observed at a finite magnetic field—and extrapolating to band filling <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mi>s</a:mi></a:math> zero field—remain poorly understood. Unraveling nature among most important open problems in...
Magnetoresistance (MR) oscillations serve as a hallmark of intrinsic quantum behavior, traditionally observed only in conducting systems. Here we report the discovery MR an insulating system, vertical junctions CrPS$_4$ which is two dimensional (2D) A-type antiferromagnetic semiconductor. Systematic investigations peaks under varying conditions, including electrode materials, magnetic field direction, temperature, voltage bias and layer number, elucidate correlation between spin-canted...
We revisit the Hofstadter butterfly for a subset of topologically trivial Bloch bands arising from continuum free electron Hamiltonian in periodic lattice potential. employ recently developed procedure, which was previously used to analyze case nontrivial [Wang and Vafek, Phys. Rev. B 106, L121111 (2022)], construct finite-field Hilbert space zero-field hybrid Wannier basis states. Such states are extended along one direction exponentially localized other. The method is illustrated square...
Frequency tunability has become a subject of concern in the field high-power microwave (HPM) source research. However, little information about corresponding mode converter is available. A tunable circularly-polarized turnstile-junction (TCTMC) for applications presented this paper. The input coaxial TEM transformed into TE10 with different phase delays four rectangular waveguides and then converted TE11 circular waveguide mode. Besides, rods are added to reduce or even eliminate reflection....
The normal-state behavior of the temperature-dependent Hall coefficient in cuprate superconductors is investigated using linear response theory. conductivity paramount importance that its sign and magnitude directly reflect charge carriers size particle-hole asymmetry effects. Here we apply a strong-pairing fluctuation theory incorporates pseudogap effects known to be important transport. As result, vicinity transition temperature our theoretical approach goes beyond conventional...
It has been well established that for symmetry-protected topological systems, the nontrivial topology prevents a real space representation using exponentially localized Wannier wave functions (WFs) in all directions, unless protecting symmetry is sacrificed as an on-site transformation. This makes it challenging to determine of various physical observables represented such WFs. In this work, we propose practical method overcoming challenges Kane-Mele model concrete example. We present...