A5100776814- Advanced Condensed Matter Physics
- Physics of Superconductivity and Magnetism
- Magnetic and transport properties of perovskites and related materials
- Multiferroics and related materials
- High-pressure geophysics and materials
- Crystal Structures and Properties
- Quantum and electron transport phenomena
- Iron-based superconductors research
- Rare-earth and actinide compounds
- Topological Materials and Phenomena
- Orbital Angular Momentum in Optics
- Electronic and Structural Properties of Oxides
- Magnetic properties of thin films
- Inorganic Fluorides and Related Compounds
- Complex Network Analysis Techniques
- Opinion Dynamics and Social Influence
- Molecular Sensors and Ion Detection
- Advanced Fiber Laser Technologies
- Magnetic Properties of Alloys
- Atomic and Subatomic Physics Research
- Electrochemical sensors and biosensors
- Quantum, superfluid, helium dynamics
- Near-Field Optical Microscopy
- 2D Materials and Applications
- Metamaterials and Metasurfaces Applications
Zhejiang Normal University
2023-2024
University of Tennessee at Knoxville
2024
Johns Hopkins University
2019-2022
NIST Center for Neutron Research
2021-2022
Tianjin University
2022
Shanghai University of Finance and Economics
2022
National Institute of Standards and Technology
2021
California Institute of Technology
2016-2021
Lanzhou Jiaotong University
2020-2021
University of Chicago
2015
Significance Magnetoresistance has a history of revealing key electronic characteristics materials. From early measurements on noble metals to definitive characterization localization effects in semiconductors recent studies topological materials, the magnetoresistive response provides an experimental technique explore Fermi surface detail, and predict craft physical properties through its sign, functional form, potential quantum character. Linear magnetoresistance density-wave systems...
Magnetism and superconductivity often compete for preeminence as a material's ground state, in the right circumstances fluctuating remains of magnetic order can induce superconducting pairing. The intertwining two on microscopic level, independent lattice excitations, is especially pronounced heavy fermion compounds, rare earth cuprates, iron pnictides. Here we point out that helical arrangement localized spins, variable pitch length provides unique tuning process from ferromagnetic to...
Abstract The phenomena of antisymmetric magnetoresistance and the planar Hall effect are deeply entwined with ferromagnetism. intrinsic magnetization ordered state permits these unusual rarely observed manifestations Onsager’s theorem when time reversal symmetry is broken at zero applied field. Here we study two classes ferromagnetic materials, rare-earth magnets high coercivity antiferromagnetic pyrochlores strongly-pinned domain walls, which both exhibit magnetoresistive behavior. By...
A magnetoresistance (MR) anomaly at low temperatures has been observed in a variety of systems, ranging from low-dimensional chalcogenides to spin and charge density wave (SDW/CDW) metals and, most recently, topological semimetals. In some systems parabolic can rise hundreds thousands times its low-temperature, zero-field value. While the origin such dramatic effect remains unresolved, these are often low-carrier-density compensated metals, physics is expected be quasi-classical. Here we...
We present a thorough experimental study of the three-dimensional hyperhoneycomb Kitaev magnet $\beta$-Li$_2$IrO$_3$, using combination inelastic neutron scattering (INS), time-domain THz spectroscopy, and heat capacity measurements. The main results include massive low-temperature reorganization INS spectral weight that evolves into broad peak centered around 12 meV, distinctive in data at 2.8(1) meV. A detailed comparison to powder-averaged spin-wave theory calculations reveals positions...
All-in--all-out (AIAO) antiferromagnets demonstrate vividly the effects of correlated charge and spin with strong spin-orbit coupling. Here, using resonant magnetic x-ray diffraction, authors directly track evolution AIAO order in pyrochlore Sm${}_{2}$Ir${}_{2}$O${}_{7}$ across a pressure-tuned quantum critical point. The results powerful approach to state driven by electron correlations $U$/$t$ orbit coupling $\ensuremath{\lambda}$/$t$. find prominent Ising-type fluctuations under pressure...
Abstract While Mott insulators induced by Coulomb interactions are a well-recognized class of metal-insulator transitions, purely driven spin correlations much less common, as the reduced energy scale often invites competition from other degrees freedom. Here, we demonstrate clean example spin-correlation-driven transition in all-in-all-out pyrochlore antiferromagnet Cd 2 Os O 7 , where lattice symmetry is preserved antiferromagnetism. After antisymmetric linear magnetoresistance conductive,...
Abstract Dimensionality and symmetry play deterministic roles in the laws of Nature. They are important tools to characterize understand quantum phase transitions, especially limit strong correlations between spin, orbit, charge, structural degrees freedom. Here, using newly-developed, high-pressure resonant X-ray magnetic charge diffraction techniques, we have discovered a critical point Cd 2 Os O 7 as all-in-all-out antiferromagnetic order is continuously suppressed zero temperature and,...
The fractionalization of magnetic dipoles into monopoles is revealed through a crossover in the relaxation dynamics spin ice.
Charge transport in solids at low temperature reveals a material’s mesoscopic properties and structure. Under magnetic field, Shubnikov–de Haas (SdH) oscillations inform complex quantum phenomena that are not limited by the ground state characteristics have facilitated extensive explorations of topological interest two- three-dimensional materials. Here, elemental metal Cr with two incommensurately superposed lattices ions spin-density-wave state, we reveal phases several low-frequency SdH...
We discuss techniques for performing continuous measurements across a wide range of pressure-field-temperature phase space, combining the milli-Kelvin temperatures helium dilution refrigerator with giga-Pascal pressures diamond anvil cell and Tesla magnetic fields superconducting magnet. With view towards minimizing remnant background susceptibility, we characterize high-strength superalloy materials pressure assembly, which allows high fidelity low-field phenomena such as superconductivity...
The nature of a material's Fermi surface is crucial to understanding its electronic, magnetic, optical, and thermal characteristics. Traditional measurements such as angle-resolved photoemission spectroscopy de Haas--van Alphen quantum oscillations can be difficult perform in the vicinity pressure-driven phase transition, although evolution may tied emergence exotic phenomena. We demonstrate here that magnetic x-ray diffraction combination with Hall effect diamond anvil cell provide valuable...
Using angular spectral representation, we demonstrate a generalized approach for generating high-dimensional elliptic umbilic and hyperbolic caustics by phase holograms. The wavefronts of such beams are investigated via the diffraction catastrophe theory determined potential function, which depends on state control parameters. We find that degenerate into classical Airy when two parameters simultaneously equal to zero, possess an intriguing autofocusing property. Numerical results exhibit...
The excellent property that the intensity of autofocusing beams in focal plane increases exponentially, makes them especially beneficial for biomedical treatment. We experimentally generate tunable (2+1)-dimensional circular parabolic umbilic (CPUBs) first time based on high-dimensional diffraction catastrophe integral, which is determined by potential function. Such CPUBs have and symmetrical distributions space through radial symmetry transformation. Due to flexibility high dimensionality,...
Abstract The neutral and interlayer exciton originates from intralayer coupling, respectively. Unlike exciton, the excitons at room temperature are hard to observe manipulate due instability. In this work, we show photoluminescence of WS 2 MoS can be improved by oleic acid passivation, allowing trion peaks observed temperature. More importantly, a 3-fold increase in peak intensity is achieved, energy blue-shifted 107 meV. Our work paves way investigate two-dimensional transition metal...
Inelastic neutron scattering (INS) measurements of powder D$_3(^{7}$Li)($^{193}$Ir)$_2$O$_6$ reveal low energy magnetic excitations with a cross section that is broad in $|Q|$ and consistent Kitaev spin-liquid (KSL) state. The nature the excitation spectrum demonstrated by longitudinally polarized studies. total moment 1.7(2)$\mu_B$/Ir inferred from effective susceptibility data expectations for $J_{\rm eff}=1/2$ single ion rise dynamic correlation function ${\cal S}(Q,\omega)$...
We develop an inverse-designed caustic approach to tailor nondiffracting structured lights that exhibit arbitrary intensity structures. Simultaneously, these can propagate in accelerated manner along three-dimensional trajectory. The scheme inherently gives rise caustics, which are singularities geometric optics. These types of possess sharp shapes and a significant gradient. Moreover, orbital angular momentum. proposed breaks the restriction conventional light beams, preserve fixed...
The authors report on a novel method to fabricate Sr-doped composition gradient epitaxial La1−xSrxMnO3 thin films by radio frequency magnetron sputtering. Biaxially strained were grown (001) LaAlO3 substrates following cosputtering procedure from LaMnO3 and La0.67Sr0.33MnO3 targets. Three depositions conducted varying the substrate temperature (750 850 °C) controlling relative deposition rate two targets their power during thickness of was about 20 30 nm for short long duration deposition,...