A5101571871- Iron-based superconductors research
- Physics of Superconductivity and Magnetism
- Topological Materials and Phenomena
- Advanced Condensed Matter Physics
- Cold Atom Physics and Bose-Einstein Condensates
- Quantum Information and Cryptography
- Rare-earth and actinide compounds
- Quantum and electron transport phenomena
- Electronic and Structural Properties of Oxides
- Quantum Mechanics and Applications
- Nanomaterials for catalytic reactions
- Catalysts for Methane Reforming
- Catalytic Processes in Materials Science
- Inorganic Fluorides and Related Compounds
- Gold and Silver Nanoparticles Synthesis and Applications
- Polymer Nanocomposite Synthesis and Irradiation
- Catalysis and Hydrodesulfurization Studies
- Superconductivity in MgB2 and Alloys
- Advanced materials and composites
- Amyloidosis: Diagnosis, Treatment, Outcomes
- Anodic Oxide Films and Nanostructures
- Boron and Carbon Nanomaterials Research
- Surface and Thin Film Phenomena
- Heusler alloys: electronic and magnetic properties
- Robotics and Sensor-Based Localization
University of Science and Technology of China
1999-2025
South China Normal University
2023-2024
Hefei National Center for Physical Sciences at Nanoscale
2006-2024
Shanghai Institute of Microsystem and Information Technology
2024
Shanghai Advanced Research Institute
2024
Chongqing University
2024
National Synchrotron Radiation Laboratory
2020-2024
HKU-Pasteur Research Pole
2024
University of Hong Kong
2023-2024
Anhui University of Science and Technology
2024
The superconductivity of a kagome superconductor CsV_{3}Sb_{5} is studied by scanning tunneling microscopy and spectroscopy at ultralow temperature with high resolution. Two kinds superconducting gaps multiple sets coherent peaks residual zero-energy density states (DOS) are observed on both half-Cs Sb surfaces, implying multiband superconductivity. In addition, in-gap can be induced magnetic impurities but not nonmagnetic impurities, suggesting sign-preserving or s-wave order parameter....
Shape-controlled gold nanoparticles were synthesized using a novel ultraviolet irradiation technique at room temperature. The very slow photoreduction process may favor the formation of shaped nanoparticles. It was found that not only concentration cations and time but also species polymer capping materials play important roles in morphology control
A novel technique for fabrication of silver nanowires was successfully developed via a so-called solid−liquid phase arc discharge method (SLPAD). It found that the aging time following SLPAD has significant effect on formation and growth nanowires. The possible process proposed. present may be extended preparation other metal
Abstract Exotic quantum states arise from the interplay of various degrees freedom such as charge, spin, orbital, and lattice. Recently, a short-ranged charge order (CO) was discovered deep inside antiferromagnetic phase Kagome magnet FeGe, exhibiting close relationships with magnetism. Despite extensive investigations, CO mechanism remains controversial, mainly because behavior hinders precise identification superstructure. Here, combining multiple experimental techniques, we report...
Kagome metals show rich competing quantum phases due to geometry frustration, flat bands, many-body effects, and nontrivial topology. Recently, a novel charge density wave (CDW) was discovered deep inside the antiferromagnetic phase of FeGe, attracting intense attention close relation with magnetism. Here, via scanning tunneling microscope (STM), we find 2 \ifmmode\times\else\texttimes\fi{} CDW in FeGe is very fragile can be readily disrupted into initial 1 phase; small \ensuremath{\surd}3...
Superconductivity emerges in both La$_3$Ni$_2$O$_7$ and La$_4$Ni$_3$O$_{10}$ under high pressure by suppressing their density-wave transitions, but critical temperature (Tc) differs significantly between these two compounds. To gain deeper insights into the distinct superconducting states, it is essential to unravel nature of states at ambient pressure, a topic that remains largely unexplored. Here, using scanning tunneling microscopy/spectroscopy (STM/STS), we report direct visualization an...
Abstract The complex symmetry breaking states in AV 3 Sb 5 family have attracted extreme research attention, but controversy still exists, especially the question of time reversal charge density wave (CDW). Most recently, a chiral CDW has been suggested Kagome magnet FeGe, related study is very rare. Here, we use scanning tunneling microscope to behavior both short- and long-ranged CDWs FeGe. Different from previous studies, our revealed an isotropic without obvious breaking, while local...
Abstract It is of pivotal importance to develop efficient catalysts and investigate the intrinsic mechanism for CO 2 methanation. Now, it reported that PdFe intermetallic nanocrystals afforded high activity stability The mass fct ‐PdFe reached 5.3 mmol g −1 h , under 1 bar (CO :H =1:4) at 180 °C, being 6.6, 1.6, 3.3, times as fcc nanocrystals, Ru/C, Ni/C, Pd/C, respectively. After 20 rounds successive reaction, 98 % original was retained nanocrystals. Further mechanistic studies revealed...
We calculate the structural and electronic properties of OsB2 using density functional theory with or without taking into account spin-orbit (SO) interaction. Our results show that bulk modulus SO interaction are 364 365 Gpa respectively, both in good agreement experiment (365-395 Gpa). The evidence covalent bonding Os-B, which plays an important role to form a hard material, is indicated charge density, atoms molecules analysis, states analysis. metallicity hardness might suggest its...
The authors propose a scheme to measure the non-Abelian gauge field through multiloop evolution and robust holonomic quantum gates, experimentally demonstrate it in degenerate eigensubspace of double-$\mathrm{\ensuremath{\Lambda}}$ four-level atomic system ${}^{87}$Rb. results could be useful for development high-resolution high-precision measurements fields.
Abstract To study the effect of internal particle size on microstructure properties and thermal decomposition characteristics site mixed emulsion explosive at different altitudes. Site was prepared with shear rate. The size, viscosity, sensitized bubbles, detonation velocity peak pressure were tested after stored simulated matrix three rotational speeds measured by thermogravimetric analyzer kinetic analysis performed non-isothermal model Kissinger–Akah–Sunose (KAS) method. results show that...
Arrays of neutral atoms have emerged as promising platforms for quantum computing. The realization high-fidelity two-qubit gates with robustness is currently a significantly important task large-scale operations. In this paper, we present convenient approach implementing controlled-phase gate Rydberg blockade. We achieve noncyclic and geometric control within single modulated pulse. Compared the scheme by cyclic evolution determined dynamical parameters, our proposal against systematic...
CdS nanocrystallites with cubic or hexagonal phase structures have been synthesised at room temperature via precipitation of Cd2+ ions homogeneously released S2− ions, generated from the decomposition thio-acetamide by ultraviolet irradiation reduction.
Intertwined spin and charge orders have been widely studied in high-temperature superconductors, since their fluctuations may facilitate electron pairing; however, they are rarely identified heavily electron-doped iron selenides. Here, using scanning tunneling microscopy, we show that when the superconductivity of (Li0.84Fe0.16OH)Fe1-xSe is suppressed by introducing Fe-site defects, a short-ranged checkerboard order emerges, propagating along Fe-Fe directions with an approximately 2aFe...
Abstract Topological superconductors have long been predicted to host Majorana zero modes which obey non-Abelian statistics and potential for realizing non-decoherence topological quantum computation. However, material realization of is still a challenge in condensed matter physics. Utilizing high-resolution angle-resolved photoemission spectroscopy first-principles calculations, we predict then unveil the coexistence Dirac semimetal insulator states vicinity Fermi energy ( E F )...
The kink structure in band dispersion usually refers to a certain electron-boson interaction, which is crucial understanding the pairing unconventional superconductors. Here we report evidence of observation Fe-based superconductor CsCa2Fe4As4F2 using angle-resolved photoemission spectroscopy. shows an orbital selective and momentum dependent behavior, located at 15 meV below Fermi level along Γ-M direction with dxz character vanishes when approaching Γ-X direction, correlated slight...
Charge density wave (CDW) can be characterized by the amplitude of its charge modulation and spatial phase coherence amongst CDW superlattice unit cells. The is usually guaranteed for weak-coupling CDW. However, McMillan [Phys. Rev. B 16, 643 (1977)] predicted that in strong coupling regime, fluctuation length could just a few cell size; short-ranged exists above transition, together with gap. In experiments, small domains often associated defects, thus making it difficult to identify role...
A charge order has been discovered to emerge deep into the antiferromagnetic phase of kagome metal FeGe. To study its origin, evolution low-lying electronic structure across transition is investigated with angle-resolved photoemission spectroscopy. We do not find signatures nesting between Fermi surface sections or van-Hove singularities in zero-frequency joint density states, and there are no obvious energy gaps at level, which exclude mechanism for formation However, two changes band have...
The measurements of x-ray diffraction, the temperature dependence dc resistance and ac susceptibility have been performed for single-phase 3D-metal doping systems YBa2 Cu3−x Mx Oy (M=Fe, Co, Ni; x=0.025, 0.05, 0.075, 0.10, 0.25, 0.50 Ni Co 0.15, 0.20 Fe). With an increase impurity content, two structural transitions were observed Fe dopants but only one dopant. resistivity in normal state changes from metallic to semiconductinglike behavior depression Tc is linear with concentration (x) when...