A5089375346- Iron-based superconductors research
- Physics of Superconductivity and Magnetism
- Ferroelectric and Piezoelectric Materials
- Electronic and Structural Properties of Oxides
- Rare-earth and actinide compounds
- Advanced Condensed Matter Physics
- Corporate Taxation and Avoidance
- Radar Systems and Signal Processing
- Underwater Acoustics Research
- Mathematical Analysis and Transform Methods
- Magnetic and transport properties of perovskites and related materials
- Image and Signal Denoising Methods
- Maritime Navigation and Safety
- Intellectual Capital and Performance Analysis
- Advanced SAR Imaging Techniques
- Microwave Dielectric Ceramics Synthesis
- Photorefractive and Nonlinear Optics
- Protist diversity and phylogeny
- Marine and coastal ecosystems
- Optical and Acousto-Optic Technologies
- Surface and Thin Film Phenomena
- Industrial Technology and Control Systems
- Ferroelectric and Negative Capacitance Devices
- Inorganic Chemistry and Materials
- Electrocatalysts for Energy Conversion
Chinese Academy of Sciences
2017-2025
University of Chinese Academy of Sciences
2017-2025
Czech Academy of Sciences, Institute of Physics
2025
Collaborative Innovation Center of Advanced Microstructures
2021-2024
Nanjing University
2021-2024
National Aviation University
2024
National Laboratory for Superconductivity
2017-2023
Institute of Physics
1992-2023
Nanjing Institute of Geography and Limnology
2020
National Center for Nanoscience and Technology
2018-2019
Abstract Perovskite‐oxide‐based ferroelectric tunnel junctions (FTJs) hold great potential for applications in non‐volatile memory and neuromorphic computing due to their unique properties. However, the challenges synthesizing high crystalline quality perovskite oxides directly on silicon wafer limit of these FTJs conventional Si‐based integrated circuits, let alone neural networks. Herein, oxide with an ON/OFF ratio up 1.2×10 6 , writing/erasing speed down 1 nanosecond, cycling endurance...
Stabilized FeSe thin films in ambient pressure with tunable superconducting critical temperature would be a promising candidate for electronic devices. By carefully controlling the depositions on twelve kinds of substrates using pulsed laser deposition technique single crystalline were fabricated. The high quality was confirmed by X-ray diffraction full width at half maximum 0.515° rocking curve and clear four-fold symmetry φ-scan. have T c ~ 15 K CaF2 substrate stable conditions air more...
The middle and lower Yangtze Plain is a typical floodplain in which many lakes connect with each other, especially the wet season. More importantly, frequent change of regional water level season, there mutual hydrodynamic exchange among these lakes. microbial biogeography interconnected still poorly understood. This study aims to unravel mechanisms underlying assembly process abundant rare bacteria Plain. Our findings will provide deeper understanding biogeographic patterns bacterial taxa...
Interfacial thermal transport plays a prominent role in the management of nanoscale objects and is fundamental importance for basic research nanodevices. At metal/insulator interfaces, configuration commonly found electronic devices, heat strongly depends upon effective energy transfer from thermalized electrons metal to phonons insulator. However, mechanism interfacial electron-phonon coupling at interfaces not well understood. Here, observation substantial enhancement resistance important...
Transition-metal perovskite oxides (ABO3) have been demonstrated to exhibit the excellent catalytic activity of oxygen evolution reaction (OER). Here, we show that layered Ruddlesden–Popper (RP) series An+1BnO3n+1 is an ideal material system with high tunability electronic structure and orbital occupancy, providing a clean reveal important factors in optimizing OER transition-metal oxides. We catalysis performance significantly enhanced nickelate (Lan+1NinO3n+1) compounds n ≥ 3 peaked at = 5...
Strain engineering has been demonstrated to be an effective knob tune the bandgap in perovskite oxides, which is highly desired for applications optics, optoelectronics, and ferroelectric photovoltaics. Multiferroic BiFeO3 exhibits great potential photovoltaic its of interest. However, mechanism strain induced remains elusive date. Here, we perform situ ellipsometry measurements investigate evolution as a function uniaxial on freestanding films. Exotic anisotropic observed, where increases...
We report the success in introducing Mn into (Li1-xFex)OHFe1-ySe superconducting crystals by applying two different hydrothermal routes, ion exchange (1-Step) and release/introduction (2-Step). The micro-region x-ray diffraction energy dispersive spectroscopy analyses indicate that has been doped lattice, its content 1-Step fabricated sample is higher than 2-Step one. Magnetic susceptibility electric transport properties reveal doping influences little on transition, regardless of or routes....
In situ Seebeck and Hall measurements on FeSe films are carried out to understand the intrinsic evolution of band structure as superconducting critical temperature $({T}_{c})$ is tuned by ionic liquid gating. At initial state, nonmonotonous behavior curves indicates multiband feature film. As ${T}_{c}$ increases via gating, hole gradually sinks below Fermi level. Meanwhile, energy electron reduces while its carrier density increases, indicating that flattening enhances. When reaches maximum...
We report the evolution of electrical transport properties in insulating FeSe films with electron doping induced by ionic liquid gating technique. Superconductivity never emerges strong insulators variable-range hopping behavior but is shown to arise once resistance normal state varies as $ln(1/T)$, indicating that this corresponds minimal conducting character for developing superconductivity. Our work points toward granular metallicity $ln(1/T)$ behavior, suggesting emergence...
We present a study of phonon modes and electron-phonon coupling in superconductor WP using angle-resolved polarized Raman spectroscopy. Seven out twelve Raman-active are detected, with frequencies good accordance by the first-principles calculations. analyze parallel- cross-polarized configurations ${\mathrm{A}}_{\mathrm{g}}$ ${\mathrm{B}}_{3\mathrm{g}}$ polarization- measurements. For observed seven modes, total parameter $\ensuremath{\lambda}$ is only about 0.07, which too small to achieve...
The vortex ratchet effects in superconducting ring-shaped NbN devices are experimentally investigated. We have studied three types of samples: a narrowing eccentric circular loop, standard and widening loop. Using the time-dependent Ginzburg–Landau simulations, we demonstrate that sample edges significantly influence dynamics vortices entering samples. Through transport measurements with dc ac currents, strong rectified voltage responses were observed for all samples over wide range...
Effectively harnessing the correlation information within data through covariance matrix, a geometrically informed matrix constant false alarm detector proves proficient in target detection amidst sea clutter, employing limited number of millimeter-wave pulses. However, current CFAR detectors solely rely on single channel, exhibiting high computational complexity, thus resulting diminished utilization and constrained scenarios. This letter proposes low-complexity based maximum eigenvalue...
Feature extraction from the normalized transformation domain is a key technique in target detection. Traditional normalization approaches assume that matrix elements follow normal distribution, but any deviations this assumption can lead to significant systematic errors. This article presents novel method modifies process fractional Fourier transform (FRFT) by incorporating threshold mechanism counteract effects of non-normal distributions. Three modified FRFT features are then extracted...
Abstract Feature extraction from the normalized transformation domain is a key technique in target detection. Traditional normalization approaches assume that matrix elements follow normal distribution, but any deviations this assumption can lead to significant systematic errors. This article presents novel method modifies process fractional Fourier transform (FRFT) by incorporating threshold mechanism counteract effects of non‐normal distributions. Three modified FRFT features are then...
The tuning of the carrier density is pivotal for uncovering underlying superconducting mechanisms and constructing quantum devices because a major parameter that influences superconductivity. However, frequently entangled with other physical degrees freedom. Tuning carriers via chemical doping will perturb pristine crystal lattice, thereby making independent control difficult to realize. In recent development on ionic gating, advantages traditional field-effect have been combined, i.e., in...