A5101511310- Physics of Superconductivity and Magnetism
- Iron-based superconductors research
- Quantum and electron transport phenomena
- Advanced Condensed Matter Physics
- Magnetic properties of thin films
- Topological Materials and Phenomena
- Theoretical and Computational Physics
- Advanced ceramic materials synthesis
- Aluminum Alloys Composites Properties
- Magnetic and transport properties of perovskites and related materials
- Superconductivity in MgB2 and Alloys
- Advanced materials and composites
- biodegradable polymer synthesis and properties
- Intellectual Capital and Performance Analysis
- Lubricants and Their Additives
- Corporate Taxation and Avoidance
- Mechanical and Optical Resonators
- Rare-earth and actinide compounds
- Superconducting and THz Device Technology
- Environmental Chemistry and Analysis
- ZnO doping and properties
- Graphene research and applications
- Quantum many-body systems
- 2D Materials and Applications
- Photonic and Optical Devices
Northwestern Polytechnical University
2025
China-Japan Friendship Hospital
2025
Nanjing University
2017-2024
Purple Mountain Laboratories
2022-2024
China Railway Construction Corporation (China)
2024
Shenzhen Metro (China)
2024
University of Science and Technology Beijing
2019-2023
Argonne National Laboratory
2011-2022
Northern Illinois University
2012-2022
Xidian University
2022
We demonstrate strong magnon-photon coupling of a thin-film Permalloy device fabricated on coplanar superconducting resonator. A strength 0.152 GHz and cooperativity 68 are found for 30-nm-thick stripe. The is tunable by rotating the biasing magnetic field or changing volume Permalloy. also observe an enhancement in nonlinear regime resonator, which attributed to nucleation dynamic flux vortices. Our results critical step towards future integrated hybrid systems quantum magnonics on-chip...
A superconducting diode is an electronic device that conducts supercurrent and exhibits zero resistance primarily for one direction of applied current. Such a dissipationless desirable unit constructing circuits with ultralow power consumption. However, realizing fundamentally technologically challenging, as it usually requires material structure without centre inversion, which scarce among materials. Here, we demonstrate achieved in conventional film patterned conformal array nanoscale...
A hallmark of materials with extremely large magnetoresistance (XMR) is the transformative turn-on temperature behavior: when applied magnetic field $H$ above certain value, resistivity versus $\ensuremath{\rho}(T)$ curve shows a minimum at dependent ${T}^{*}$, which has been interpreted as magnetic-field-driven metal-insulator transition or attributed to an electronic structure change. Here, we demonstrate that curves behavior in newly discovered XMR material ${\mathrm{WTe}}_{2}$ can be...
From a bar to charge, magnetically Artificial spin ices are arrays of nanoscale magnets that can mimic the behavior naturally occurring “frustrated” magnetic materials. Usually take form square lattice with perpendicular its sides. Wang et al. “broke up” each into positive and negative charge. Working backward from an array these charges, they designed structure has oriented not only perpendicularly sides but also diagonally. Compared traditional one, this was much more controllable by...
Extremely large magnetoresistance (XMR) was recently discovered in WTe_{2}, triggering extensive research on this material regarding the XMR origin. Since WTe_{2} is a layered compound with metal layers sandwiched between adjacent insulating chalcogenide layers, has been considered to be electronically two-dimensional (2D). Here we report two new findings WTe_{2}: (1) 3D mass anisotropy as low 2, revealed by scaling behavior of resistance R(H,θ)=R(ϵ_{θ}H)...
When the tunnel passed through a water-rich stratum, Water Rock Interaction could cause damage to rock, which had adverse effects on engineering.When water environment changed, great risk existed in during construction.In this paper, was classified as rock physical interaction, chemical and mechanical is significantly affected by temperature humidity.Then, macroscopic microscopic properties of under dry-wet cycle freeze-thaw were summarized.The influence stability analyzed classification...
Developing strategies to manage ion-migration-induced phase segregation in wide-bandgap (WBG) perovskites is crucial for achieving high-performance perovskite-silicon tandem solar cells (TSCs). However, maintaining continuous suppression of from the film crystallization process device operation remains a significant challenge. The present study demonstrates an efficient strategy activating halogen circulation WBG perovskite by using agents (HCA) N-halosuccinimide molecules as sustainable...
We present point-contact spectroscopy data for junctions between a normal metal and the newly discovered F-doped superconductor LaO0.9F0.1−δFeAs (F-LaOFeAs). A zero-bias conductance peak was observed its shape magnitude suggest presence of Andreev bound states at surface F-LaOFeAs, which provides possible evidence an unconventional pairing symmetry with nodal gap function. The maximum value Δ0≈3.9±0.7 meV determined from measured spectra, in good agreement recent experiments on specific heat...
By substituting the Fe with $4d$- and $5d$-transition metals Rh, Ir, Pd in ${\text{SrFe}}_{2}{\text{As}}_{2}$, we have successfully synthesized a series of superconductors ${\text{SrFe}}_{2\ensuremath{-}x}{M}_{x}{\text{As}}_{2}$ ($M=\text{Rh}$, Pd) explored phase diagrams them. The systematic evolution lattice constants indicated that part ions were replaced by transition Pd. increasing doping content Pd, antiferromagnetic (AF) state parent is suppressed progressively superconductivity...
The newly developed hydrogen sensor, based on a network of ultrasmall pure palladium nanowires sputter-deposited filtration membrane, takes advantage single nanowires' characteristics high speed and sensitivity while eliminating their nanofabrication obstacles. However, this new type like the nanowires, cannot distinguish concentrations above 3%, thus limiting potential applications sensor. This study reports sensors Cr-buffered Pd (Pd/Cr) membrane. These not only are able to outperform...
The maximum current (critical current) a type-II superconductor can transmit without energy loss is limited by the motion of quantized magnetic flux penetrating into superconductor. Introducing nanoscale holes superconducting film has been long pursued as promising way to increase critical current. So far enhancement was found be mostly low fields. Here we experimentally investigate currents films with conformal array that have nonuniform density while preserving local ordering. We find...
We report the observation of two gaps in superconductor SmFeAsO0.9F0.1 (F–SmFeAsO) with Tc = 51.5 K as measured by point-contact spectroscopy. Both decrease temperature and vanish at Tc, dependence is described theoretical prediction Bardeen–Cooper–Schrieffer (BCS) theory. A zero-bias conductance peak (ZBCP) was observed, indicating presence sign reversal gap function F–SmFeAsO. Our results strongly suggest an unconventional superconductivity multiple
We used high-resolution scanning tunneling spectroscopy to study the hole-doped iron pnictide superconductor Ba$_{0.6}$K$_{0.4}$Fe$_{2}$As$_{2}$ ($T_c=38$ K). Features of a bosonic excitation (mode) are observed in measured quasiparticle density states. The features intimately associated with superconducting order parameter and have mode energy $\sim$14 meV, similar spin resonance by inelastic neutron scattering. These results indicate strong electron-spin coupling pictnide superconductors,...
Maximizing the sustainable supercurrent density, J C, is crucial to high-current applications of superconductivity. To achieve this, preventing dissipative motion quantized vortices key. Irradiation superconductors with high-energy heavy ions can be used create nanoscale defects that act as deep pinning potentials for vortices. This approach holds unique promise iron-based because C amplification persists much higher radiation doses than in cuprate without significantly altering...
Electron-hole (e-h) compensation is a hallmark of multi-band semimetals with extremely large magnetoresistance (XMR) and has been considered to be the basis for XMR. Recent spectroscopic experiments, however, reveal that YSb non-saturating uncompensated, questioning e-h scenario Here we demonstrate magnetoresistivity angle dependent Shubnikov - de Haas (SdH) quantum oscillation measurements does have nearly perfect compensation, density ratio $0.95$ electrons holes. The mobility anisotropy...
A notable phenomenon in topological semimetals is the violation of Kohler$^,$s rule, which dictates that magnetoresistance $MR$ obeys a scaling behavior $MR = f(H/\rho_0$), where [\rho_H-\rho_0]/\rho_0$ and $H$ magnetic field, with $\rho_H$ $\rho_0$ being resistivity at zero respectively. Here we report originating from thermally-induced change carrier density. We find Weyl semimetal, TaP, follows an extended rule f[H/(n_T\rho_0)]$, $n_T$ describing temperature dependence show associated...
We report investigations on the magnetotransport in LaSb, which exhibits extremely large magnetoresistance (XMR). Foremost, we demonstrate that resistivity plateau can be explained without invoking topological protection. then determine Fermi surface from Shubnikov - de Haas (SdH) quantum oscillation measurements and find good agreement with bulk pockets derived first principle calculations. Using a semiclassical theory experimentally determined pocket anisotropies, quantitatively describe...