A5100668950- Advanced Thermoelectric Materials and Devices
- Iron-based superconductors research
- Metal-Organic Frameworks: Synthesis and Applications
- Physics of Superconductivity and Magnetism
- Corporate Taxation and Avoidance
- Thermal properties of materials
- Magnetic and transport properties of perovskites and related materials
- Rare-earth and actinide compounds
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Advanced Condensed Matter Physics
- Magnetism in coordination complexes
- Graphene research and applications
- Pharmaceutical and Antibiotic Environmental Impacts
- Carbon Nanotubes in Composites
- Perovskite Materials and Applications
- Thermal Radiation and Cooling Technologies
- Chalcogenide Semiconductor Thin Films
- 2D Materials and Applications
- Conducting polymers and applications
- Crystallography and molecular interactions
- Advanced Battery Materials and Technologies
- Intellectual Capital and Performance Analysis
- Water Treatment and Disinfection
- Thermal Expansion and Ionic Conductivity
University of Science and Technology of China
2008-2025
Institute of High Performance Computing
2016-2025
Ningbo Institute of Industrial Technology
2021-2025
Agency for Science, Technology and Research
2016-2025
Jilin Jianzhu University
2025
Chinese Academy of Sciences
2020-2025
Xinjiang Agricultural University
2025
Xi'an Polytechnic University
2024-2025
University of Science and Technology Beijing
2025
Hefei National Center for Physical Sciences at Nanoscale
2005-2024
The recent discovery of superconductivity in $(\mathrm{Ba},\mathrm{K}){\mathrm{Fe}}_{2}{\mathrm{As}}_{2}$, which crystallizes the ${\mathrm{ThCr}}_{2}{\mathrm{Si}}_{2}$ (122) structure as compared with LnFeAsO (Ln is lanthanide) systems that possess ZrCuSiAs (1111) structure, demonstrates exciting potential FeAs-based materials for high-${T}_{C}$ superconductivity. Here we report neutron diffraction studies show a tetragonal-to-orthorhombic distortion associated onset $\mathbf{q}=(101)$...
The relation between the spin-density wave (SDW) and superconducting order is a central topic in current research on FeAs-based high-TC superconductors. Conflicting results exist LaFeAs(O, F)-class of materials, for which whether SDW superconductivity are mutually exclusive or they can coexist has not been settled. Here we show that (Ba, K)Fe2As2 system, an extended range compositions. availability single crystalline samples high value energy gaps would make materials model system to...
Two-dimensional covalent-organic frameworks (2D COFs) have recently emerged as great prospects for their applications new photocatalytic platforms in solar-to-hydrogen conversion; nevertheless, inefficient solar energy capture and fast charge recombination hinder the improvement of hydrogen production performance. Herein, two photoactive three-component donor-π-acceptor (TCDA) materials were constructed using a multicomponent synthesis strategy by introducing electron-deficient triazine...
As the sole dominator of commercial thermoelectric (TE) market, Bi2 Te3 -based alloys play an irreplaceable role in Peltier cooling and low-grade waste heat recovery. Herein, to improve relative low TE efficiency determined by figure merit ZT, effective approach is reported for improving performance p-type (Bi,Sb)2 incorporating Ag8 GeTe6 Se. Specifically, diffused Ag Ge atoms into matrix conduce optimized carrier concentration enlarge density-of-states mass while Sb-rich nanoprecipitates...
Abstract Bi 2 Te 3 ‐based alloys have historically dominated the commercial realm of near room‐temperature thermoelectric (TE) materials. However, more widespread application is currently constrained by its mediocre TE performance and inferior mechanical properties resulting from intrinsic hierarchical structure. Herein, microstructure modulation carrier transport optimization strategies are employed to efficiently balance electro‐thermal performance. Specifically, weighted mobility...
Bismuth-telluride-based alloy has long been considered as the most promising candidate for low-grade waste heat power generation. However, optimizing thermoelectric performance of n-type Bi
Achieving high ionic conductivity and stable performance at low temperatures remains a significant challenge in sodium‐metal batteries (SMBs). In this study, we propose novel electrolyte design strategy that elucidates the solvation structure‐function relationship within mixed solvent systems. A mixture of diglyme 1,3‐dioxolane was developed to optimize structure towards superior low‐temperature electrolyte. Molecular dynamics simulations Raman spectra results reveal solvent‐separated ion...
We report the detailed phase diagram and anomalous transport properties of Fe-based high-T_{c} superconductors SmFeAsO1-xFx. It is found that superconductivity emerges at x approximately 0.07, optimal doping takes place in 0.20 sample with highest T_{c} 54 K. increases monotonically doping; anomaly resistivity from structural or spin-density-wave order rapidly suppressed, suggesting a quantum critical point around 0.14. As manifestations, linear temperature dependence shows up high...
We report that sizable single crystals of ${\mathrm{BaFe}}_{2}{\mathrm{As}}_{2}$ have been grown with the self-flux method. Measurements and anisotropy intrinsic transport magnetic properties from high-quality crystal are first presented. The resistivity (${\ensuremath{\rho}}_{c}/{\ensuremath{\rho}}_{ab}$) is as large 150 independent temperature. In contrast to susceptibility behavior observed in polycrystalline samples, no Curie-Weiss observed, a linear-$T$ dependent occurs...
We present an atomic resolution scanning tunneling spectroscopy study of superconducting ${\mathrm{BaFe}}_{1.8}{\mathrm{Co}}_{0.2}{\mathrm{As}}_{2}$ single crystals in magnetic fields up to 9 T. At zero field, a gap with coherence peaks at $\overline{\ensuremath{\Delta}}=6.25\text{ }\text{ }\mathrm{meV}$ is observed the density states. and 6 T, we image disordered vortex lattice, consistent isotropic, flux quantum vortices. Vortex locations are uncorrelated strong-scattering surface...
We study heat conduction in $(n,0)∕(2n,0)$ intramolecular junctions by using molecular dynamics method. It is found that the asymmetric, namely, transports preferably one direction. This phenomenon also called thermal rectification. The rectification weakly dependent on detailed structure of connection part but strongly temperature gradient. effect tube radius and junction length Our shows tensile stress can increase physical mechanism explained.
We report intrinsic transport and magnetic properties their anisotropy in high-quality single-crystal CaFe2As2. The resistivity (ρc/ρab) is ∼50, less than the 150 of BaFe2As2, which arises from strong coupling along c-axis due to an apparent contraction about 0.13 nm compared BaFe2As2. In sharp contrast case parent compounds ROFeAs (R = rare earth) MFe2As2 (M Ba Sr), spin-density-wave (SDW) ordering (or structural transition) leads a steep increase Such different response SDW helpful...
Abstract The novel supramolecular frameworks [Cd(BDC)(phen)(H 2 O)] n ( ) and [Cd (HBTC) (phen) ] · Cd(HBTC)(phen) 3 have been synthesized by reaction of the metal source Cd(phen) (NO 1 with benzene‐1,4‐dicarboxylic acid (H BDC) benzene‐1,3,5‐tricarboxylic BTC), respectively in a mixed solution DMF/C H 5 OH/H O. three‐dimensional structure is constructed through hydrogen‐bond aromatic π−π interactions between adjacent metal‐organic polymeric coordination chains. Conversely, interestingly,...
The magnetic properties in the parent compounds are often intimately related to microscopic mechanism of superconductivity. Here we report first direct measurements on electronic structure a compound newly discovered iron-based superconductor, BaFe2As2, which provides foundation for further studies. We show that energy spin density wave BaFe2As2 is mainly lowered through exotic exchange splitting band structure.
We synthesized the samples Sr(1-x)Sm(x)FFeAs with a ZrCuSiAs-type structure. These were characterized by resistivity and susceptibility. It is found that substitution of rare earth metal for alkaline in this system suppresses anomaly induces superconductivity. Superconductivity at 56 K nominal composition Sr(0.5)Sm(0.5)FFeAs realized, indicating superconducting transition temperatures iron arsenide fluorides can reach as high oxypnictides same
The transition temperature ${T}_{C}\ensuremath{\approx}26\text{ }\text{ }\mathrm{K}$ of the recently discovered superconductor ${\mathrm{LaFeAsO}}_{1\ensuremath{-}x}{\mathrm{F}}_{x}$ is extremely sensitive to lanthanide ion, reaching 55 K for Sm containing oxypnictides. Therefore, it important determine how moment on affects overall magnetism in these systems. Here we report a neutron diffraction study Nd Long-ranged antiferromagnetic order apparent NdFeAsO below 1.96 K. Rietveld refinement...
A hybrid molecular simulation study is reported to examine adsorption and diffusion of CO2 CH4 in zeolitic imidazolate framework-8 (ZIF-8). The structure flexibility ZIF-8 described using a recently developed force field (Zhang, L. J. Am. Chem. Soc. 2013, 135, 3722). simulated isotherms rigid flexible are nearly identical agree well with experimental data; thus, the effect on indiscernible. In remarkable contrast, significant. No diffusive motion observed for ZIF-8; by incorporating...
The conductivity enhancement in solvent treated PEDOT:PSS is a result of the solvation PSS shell, leading to release conductive PEDOT core.