A5101707250- Magnetic and transport properties of perovskites and related materials
- Multiferroics and related materials
- Ferroelectric and Piezoelectric Materials
- Physics of Superconductivity and Magnetism
- High-pressure geophysics and materials
- Advanced Thermoelectric Materials and Devices
- Advanced Condensed Matter Physics
- Topological Materials and Phenomena
- Quantum, superfluid, helium dynamics
- Nuclear Materials and Properties
- Iron-based superconductors research
- Fusion materials and technologies
- Electronic and Structural Properties of Oxides
- ZnO doping and properties
- Perovskite Materials and Applications
- Rare-earth and actinide compounds
- Thermal Expansion and Ionic Conductivity
- Heusler alloys: electronic and magnetic properties
- Advanced Chemical Physics Studies
- Graphene research and applications
- Nuclear materials and radiation effects
- Advancements in Battery Materials
- Microwave Dielectric Ceramics Synthesis
- MXene and MAX Phase Materials
- 2D Materials and Applications
Chinese Academy of Sciences
2010-2025
Fujian Institute of Research on the Structure of Matter
2025
University of Electronic Science and Technology of China
2020-2025
Westlake University
2024
Institute of Physics
2008-2023
Czech Academy of Sciences, Institute of Physics
2008-2023
Anhui University
2021
Huzhou University
2021
China Jiliang University
2017
Chengdu University of Technology
2014
Bi2Te3 compound has been theoretically predicted (1) to be a topological insulator, and its topologically non-trivial surface state with single Dirac cone observed in photoemission experiments (2). Here we report that superconductivity (Tc^~3K) can induced as-grown crystal (with hole-carriers) via pressure. The first-principles calculations show the electronic structure under pressure remains nontrivial, Dirac-type states well distinguished from bulk at corresponding Fermi level. proximity...
By directly measuring electrical hysteresis loops using the Positive-Up Negative-Down (PUND) method, we accurately determined remanent ferroelectric polarization Pr of orthorhombic RMnO3 (R = Ho, Tm, Yb, and Lu) compounds below their E-type spin ordering temperatures. We found that LuMnO3 has largest 0.17 uC/cm^2 at 6 K in series, indicating its single-crystal form can produce a least 0.6 \muuC/cm^2 0 K. Furthermore, fixed temperature, decreases systematically with increasing rare earth ion...
Studies on polyhydrides are attracting growing attentions recently due to their potential high temperature superconductivity (SC). We here report the discovery of SC in hafnium at pressures. The superhydrides synthesized pressure and conditions using diamond anvil cell combination with in-situ laser heating technique. was investigated by resistance measurements applied magnetic fields. A superconducting transition onset Tc ∼83 K observed 243 GPa. upper critical field μ0Hc2(0) estimated be 24...
We report experimental discovery of tantalum polyhydride superconductor. It was synthesized at high pressure and temperature conditions using diamond anvil cell combined with in-situ laser heating techniques. The superconductivity investigated via resistance measurements pressures. highest superconducting transition Tc found to be ~30 K 197 GPa in the sample that same ~2000 heating. transitions are shifted low upon applying magnetic fields supports nature. upper critical field zero...
Metal–organic frameworks (MOFs) with polyoxometalates (POMs) as the nodes usually feature a high stability. Those available space and modifiable groups are expected to serve catalytic platform. In this work, polyoxometalate-based metal–organic framework (POMOF)-bearing channel transversal surface of ca. 1.1 × 1.8 nm, [Ni(en)2]4H{[Ni6(tris)(en)3(SIP)1.5][B-α-PW9O34]}2·32H2O (1), was resulted by collaboration multiple ligands. The lined abundant amino that bonded water molecules in it via...
The electron mobility of the BiCuOSe/Bi 2 O Se monolayer is remarkably higher than that bulk Bi and at 300 K.
Multiferroic BiMnO3 with a highly distorted perovskite structure induced by the stereochemically active 6s2 electron lone pairs of Bi3+ was synthesized at high pressure 6 GPa. Magnetization, differential scanning calorimetry, dielectric permittivity, and in situ powder x-ray diffraction as function temperature were carried out, respectively. In light comprehensive evaluation, we can conclude that synthetic ceramic displays ferromagnetic ferroelectric orderings simultaneously, i.e.,...
The recently discovered three-dimensional topological insulator Bi2Te3 is studied as function of pressure in terms crystal structures, resistance, and Hall coefficient. superconductivity found phase I (ambient phase) with Tc ∼ 3 K, which related to the features. evolution structure investigated by high synchrotron radiation experiments that reveal structural transitions occurring at about 8 GPa, 13 16 respectively. Furthermore, phases are also superconducting but much higher K. compared...
The optimal ZT values for p-type (n-type) doped ZrSn 2 N 4 can reach a moderate level of 1.15 (0.91) at 1200 K, which demonstrates the great potential monolayer as TE material.
Whether large ferroelectric polarization P exists in the orthorhombic HoMnO3 with E-type antiferromagnetic spin ordering or not remains as one of unresolved, challenging issues physics multiferroics. The issue is closely linked to an intriguing experimental difficulty for determining polycrystalline specimens that conventional pyroelectric current measurements performed after a poling procedure under high dc electric fields are subject errors due problems caused by leakage currents space...
Dense hexagonal TmMnO3 ceramics were synthesized by solid-state reaction technique combined with high-pressure treatment which significantly increased the density of ceramic samples. The crystal structure oxide was refined using Rietveld analysis based on powder x-ray diffraction experiment. We observed obvious dielectric peaks through measurement specimen subjected to postannealing in oxygen atmosphere. A ferroelectric-paraelectric transition around 348°C is identified....
In recent years, U3Si2 has been proposed as an alternative nuclear fuel material to uranium dioxide (UO2) because of its intrinsically high density and thermal conductivity. However, the operation environment in reactor is complex extreme, such in-pile neutron irradiation, thus it necessary explore radiation response behavior physical properties damaged states. present study, first-principles calculations based on functional theory were carried out investigate mechanical electronic defective...
Multiferroic BiFeO3 was fabricated via a high pressure of 5 GPa at 900 °C. The crystal structure the ceramic determined by X-ray diffraction (XRD) to be rhombohedral perovskite with space group R3c. temperature dependence XRDs collected down K under ambient that showed no phase transition. structural evolution pressures up 56.6 studied room using diamond anvil cell combined synchrotron radiation XRD. A possible transition proposed around 10 GPa. bulk modulus estimated B 0=97.3(7) in...
The behavior of superconductivity "111"-type iron pnictide superconductors, namely, LiFeAs, NaFeAs and LiFeP, is investigated at different pressures through electrical resistance measurements. For LiFeAs the superconducting transition temperature T c decreases monotonously with increasing pressure, pressure coefficient dT /dP being−1.38 and−1.26 K/GPa, respectively. increases to a maximum value 3 GPa; further suppresses slope about−3.40 K/GPa.
Abstract A Sr 2 CuO 3+ δ superconductor with a new modulated structure has been synthesized using high pressure technique. Two superconducting transitions Tc ∼ 75 K and ∼ 48 K respectively were found in superconductor. The volume fraction is calculated to be 85% at 2 K, which much higher than anyone else reported before. type of phase periodicity 2√2 p × 2√2 × c Pmmm symmetry the sample by transmission electron microscopy. Our experimental results suggest that responsible for...
Abstract Strong spin orbital interaction (SOI) can induce unique quantum phenomena such as topological insulators, the Rashba effect, or p-wave superconductivity. Combining these three into a single compound has important scientific implications. Here we report experimental observations of consecutive phase transitions from type trivial to insulator state then further proceeding superconductivity in SOI BiTeI tuned via pressures. The electrical resistivity measurement with V shape change...
The high-pressure-induced structure transition in multiferroic hexagonal TmMnO3 (h-TmMnO3) has been investigated using an situ angle-dispersive synchrotron X-ray diffraction technique a diamond anvil cell. experimental results show that the phase from ambient to orthorhombic with space group Pbnm begins around 10.2 GPa. Rietveld refinement method was used determine lattice parameters and compressibility of h-TmMnO3 compound 0.8 28.6 pressure evolution average bond distances angles between Mn...
We have investigated the relation between ferroelectric and magnetic orders of orthorhombic (o-) LuMnO3 ceramics. The increase dielectric constant ɛ exceeds 82% near incommensurate to commensurate E-type antiferromagnetic (AFM) spin ordering transition temperature TL, reflecting a large magneto (thermo) response. Meanwhile, distinct anomalies thermal hysteresis behavior are observed this in both dependence specific heat Cp, indicating strong coupling FE o-LuMnO3. Comparing o-HoMnO3, TmMnO3,...