A5101801171- Physics of Superconductivity and Magnetism
- Iron-based superconductors research
- Rare-earth and actinide compounds
- Advanced Condensed Matter Physics
- Boron and Carbon Nanomaterials Research
- MXene and MAX Phase Materials
- High-pressure geophysics and materials
- Advanced Chemical Physics Studies
- Superconductivity in MgB2 and Alloys
- Magnetic and transport properties of perovskites and related materials
- Corporate Taxation and Avoidance
- Quantum and electron transport phenomena
- Nuclear Materials and Properties
- Multiferroics and related materials
- Nanowire Synthesis and Applications
- Intermetallics and Advanced Alloy Properties
- Thermal Expansion and Ionic Conductivity
- Advanced materials and composites
- Metal and Thin Film Mechanics
- Quantum, superfluid, helium dynamics
- Nuclear Physics and Applications
- Inorganic Chemistry and Materials
- Plasmonic and Surface Plasmon Research
- Semiconductor materials and devices
- Electron and X-Ray Spectroscopy Techniques
Yantai University
2015-2024
Sinocelltech Group (China)
2024
Shanghai Institute of Measurement and Testing Technology
2022
Tsinghua University
2006-2018
Institute of Theoretical Physics
2003
Chinese Academy of Sciences
2003
A universal linear-temperature dependence of the uniform magnetic susceptibility has been observed in non-magnetic normal state iron pnictides. This non-Pauli and non-Curie-Weiss-like paramagnetic behavior cannot be understood within a simple mean-field picture. We argue that it results from existence wide antiferromagnetic fluctuation window which local spin-density-wave correlations exist but global directional order not established yet.
Abstract We propose an eigen microstate approach (EMA) for analyzing quantum phase transitions in many-body systems, introducing a novel framework that does not require prior knowledge of order parameter. Using the transverse-field Ising model (TFIM) as case study, we demonstrate effectiveness EMA by identifying key features transition through scaling behavior eigenvalues and structure associated microstates. Our results reveal substantial changes ground state TFIM it undergoes transition,...
Abstract The negative thermal expansion behavior (NTE) of Zn(CN)2 over a wide range temperature has received significant attention. Here, we develop machine learning interatomic potential and perform large-scale molecular dynamics simulations through which unveil the NTE mechanisms Zn(CN)2. Analysis trajectories atoms reveal that C N move on lateral side Zn…Zn axis with different distance. C≡N bond is not exactly parallel to axis. bridging exhibit unique motion combines movement tilted...
We investigated the form of orbital ordering in electronic nematic phase iron-based superconductors by applying a group theoretical analysis on realistic five-band model. find order can be either inter-orbital s-wave or intra-orbital d-wave form. From comparison with existing ARPES measurements band splitting, we 122 system is dominated an component, while that 111 component. both forms are strongly entangled nematicity spin correlation system. The condensation energy magnetic ordered found...
We propose a model-independent scaling method to study the physical properties of high-temperature superconductors in normal state. have analyzed experimental data $c$-axis resistivity, in-plane Hall coefficient, magnetic susceptibility, spin-lattice relaxation rate, and thermoelectric power using this method. It is shown that all these quantities exhibit good behaviors, controlled purely by pseudogap energy scale The doping dependence obtained from analysis agrees with results...
The electronic structures, phonon dispersions, and electron–phonon coupling of Nb2CT2 (T = O, S, Se, or Te) MXenes were investigated via first-principles calculations. Different models constructed, the results show that low-energy are intrinsic phonon-mediated superconductors. Of four MXenes, Nb2CO2 MXene exhibits largest superconducting critical temperature (Tc) 14.43 K. existence soft modes induced by Kohn anomalies contribution Nb atoms to Fermi level lead strong (λ 0.92) in MXene. Tc is...
The angle-resolved photoemission spectroscopy (ARPES) is one powerful experimental technique to study the electronic structure of materials. As many electron materials show unusual many-body correlations, detect directly these correlations will play important roles in their physics. In this article, we propose a two-particle coincidence ARPES (cARPES) where two incident photons excite respective photoelectrons which are detected coincidence. While one-photon-absorption and...
The heavy Fermi liquid with short-range antiferromagnetic correlations is carefully considered in the two-dimensional Kondo-Heisenberg lattice model. As ratio of local Heisenberg superexchange ${J}_{H}$ to Kondo coupling ${J}_{K}$ increases, topology surface (FS) quasiparticles changes: at ${J}_{H}/{J}_{K}=0.1055$ a first-order quantum phase transition identified, where small FS circle begins emerge within large deformed centered ($\ensuremath{\pi},\ensuremath{\pi}$). When...
A layered superconductor with a full pairing energy gap can be driven into nodal superconducting (SC) state by inter-layer when the SC becomes more quasi-3D. We propose that this mechanism is responsible for observed behavior in class of iron-based SCs. show intra- and pairings generally compete nodes develop on one {\em hole} Fermi surface pockets as they become larger iron-pnictides. Our results provide natural explanation c-axis modulations angle resolved photoemission spectroscopy....
We propose and show that the c-axis transport in high-temperature superconductors is controlled by pseudogap energy resistivity satisfies a universal scaling law phase. derived approximately function for found it fits well with experimental data of Bi$_2$Sr$_2$CaCu$_2$O$_{8+\delta}$, Bi$_2$Sr$_2$Ca$_2$Cu$_3$O$_{10+\delta}$, YBa$_2$Cu$_3$O$_{7-\delta}$. Our works reveals physical origin semiconductor-like behavior suggests hopping predominantly coherent.
The electronic nematic responses in Fe-based superconductors have been observed ubiquitously various experimental probes. One novel character is the d-wave {\it bond} orbital-relevant charge order which was firstly proposed by symmetry analysis and then conformed angle-resolved photoemission spectroscopy. In this paper, we present a mechanism that driving force of reduction large Hubbard energy particle-hole channel virtual hopping processes. This one scenario from strong-coupling...
The thermodynamically (meta)stable phases of molybdenum–phosphorus under pressure are explored at pressures from ambient up to 200 GPa using an evolutionary algorithm designed for crystal structure prediction combined with first-principles density functional calculations. All experimentally synthesized Mo–P structures found atmospheric pressure, namely, stable Mo3P, MoP, MoP2, and MoP4 the metastable Mo8P5 Mo4P3 phases. When increases 0 GPa, five stoichiometries emerge: Mo4P, Mo2P, Mo8P5,...
The crystalline structures of thorium dihydride, ThH2, under pressure are investigated by using an unbiased structure searching method coupled with ab initio calculations. Three low-enthalpy phases found as the thermodynamic ground states ThH2 up to 200 GPa, including experimentally observed I4/mmm phase and two newly predicted monoclinic (C2/m C/2c phase). is undergo → C2/m transitions without zero-point (ZP) effects, whereas it directly transforms from C2/c ZP effects. Phonon calculations...
The mechanical and thermodynamic properties of four ytterbium carbides with increasing carbon content have been examined using<italic>ab initio</italic>calculations based on density functional theory.
Physical effects of bilayer coupling on the tunneling spectroscopy high-${T}_{c}$ cuprates are investigated. The separates bonding and antibonding bands leads to a splitting coherence peaks in differential conductance. However, peak band is strongly suppressed broadened by particle-hole asymmetry density states finite quasiparticle lifetime, difficult resolve experiments. This gives qualitative account why was not clearly observed measurements double-layer oxides.
Conventionally, the optical properties of finite semiconductor nanowires have been understood and explained in terms an infinite nanowire. This work describes completely different photonic modes for a semi-finite nanowire based on rigorous theoretical method, implications one. First, special eigenvalue problem charactered by end results distinctive mode spectrum semi-infinite dielectric Meanwhile, show hybrid degenerate away from cutoff frequency, transverse electric–transverse magnetic...