A5043786077- Advanced Condensed Matter Physics
- Magnetic and transport properties of perovskites and related materials
- Electronic and Structural Properties of Oxides
- High-pressure geophysics and materials
- Iron-based superconductors research
- Multiferroics and related materials
- Topological Materials and Phenomena
- Metal-Organic Frameworks: Synthesis and Applications
- Advanced Photocatalysis Techniques
- Rare-earth and actinide compounds
- Geological and Geochemical Analysis
- Advanced Nanomaterials in Catalysis
- Solid-state spectroscopy and crystallography
- Analytical chemistry methods development
- earthquake and tectonic studies
- Electrical Contact Performance and Analysis
- Nanocluster Synthesis and Applications
- Dielectric properties of ceramics
- Amyloidosis: Diagnosis, Treatment, Outcomes
- Carbon and Quantum Dots Applications
- Geological formations and processes
- Synthesis and properties of polymers
- Covalent Organic Framework Applications
- Copper Interconnects and Reliability
- Paleontology and Stratigraphy of Fossils
Guangdong University of Technology
2024-2025
Sichuan Normal University
2024
Nanjing University
2015-2024
Collaborative Innovation Center of Advanced Microstructures
2015-2024
Hankou University
2023
The recently discovered kagome metals $A$V${}_{3}$Sb${}_{5}$ ($A$=K, Rb or Cs) have generated great interest as they exhibit an unconventional charge density wave (CDW), superconductivity, and nontrivial band topology. Here, the authors combine infrared spectroscopy first-principles calculations to shed light on origin of CDW. They find that below CDW transition optical conductivity component associated with saddle points is significantly suppressed, while arising from light-electron Dirac...
The discovery of superconductivity with a critical temperature about 80 K in La3Ni2O7 single crystals under pressure has received enormous attention. is not superconducting ambient but exhibits transition at T ∗ ≃ 115 K. Understanding the electronic correlations and charge dynamics an important step towards origin other instabilities. Here, our optical study shows that features strong which significantly reduce electron's kinetic energy place this system proximity Mott phase. low-frequency...
The discovery of superconductivity with a critical temperature about 80~K in La$_{3}$Ni$_{2}$O$_{7}$ single crystals under pressure has received enormous attention. is not superconducting ambient but exhibits transition at $T^{\ast} \simeq 115$~K. Understanding the electronic correlations and charge dynamics an important step towards origin other instabilities. Here, our optical study shows that features strong which significantly reduce electron's kinetic energy place this system proximity...
Expanding the spectral response of photocatalysts to facilitate overall water splitting (OWS) represents an effective approach for improving solar spectrum utilization efficiency. However, majority single‐phase designed OWS primarily respond ultraviolet region, which accounts a small proportion sunlight. Herein, we present versatile strategy achieve broad visible‐light‐responsive photocatalysis dominated by direct ligand‐to‐cluster charge transfer (LCCT) within metal–organic frameworks...
Expanding the spectral response of photocatalysts to facilitate overall water splitting (OWS) represents an effective approach for improving solar spectrum utilization efficiency. However, majority single‐phase designed OWS primarily respond ultraviolet region, which accounts a small proportion sunlight. Herein, we present versatile strategy achieve broad visible‐light‐responsive photocatalysis dominated by direct ligand‐to‐cluster charge transfer (LCCT) within metal–organic frameworks...
The transport and optical properties of Nb-doped $\mathrm{Cs}({\mathrm{V}}_{1\ensuremath{-}x}{\mathrm{Nb}}_{x}$)${}_{3}{\mathrm{Sb}}_{5}$ with $x=0.03$ 0.07 have been investigated compared those undoped ${\mathrm{CsV}}_{3}{\mathrm{Sb}}_{5}$. Upon Nb doping, the charge density wave (CDW) transition temperature ${T}_{\text{CDW}}$ is suppressed, superconducting ${T}_{c}$ rises. residual resistivity ratio decreases suggesting an increase disorder. For all compounds, conductivity in pristine...
The kagome metals $A$V$_{3}$Sb$_{5}$ ($A$ = K, Rb, Cs) have attracted enormous interest as they exhibit intertwined charge-density wave (CDW) and superconductivity. alkali-metal dependence of these characteristics contains pivotal information about the CDW its interplay with Here, we report optical studies across whole family. With increasing atom radius from K to Cs, gap increases monotonically, whereas $T_{\text{CDW}}$ first rises then drops, at variance conventional CDW. While Fermi...
Here, we present the structural characterization and physical properties of Ba2FeVO6 (BFVO) ceramics prepared by solid-state ceramic method, which is regarded as potential Mott multiferroics. Structural studies demonstrate that BFVO samples crystallize in a hexagonal structure with R3c symmetry. SEM images show spherical morphology grains an average composition Bi:Fe:V close to 2.0:1.0:1.0 determined x-ray energy dispersive spectroscopy. Infrared spectra revealed vibrational modes [FeO6]...
We present an investigation into the optical properties of ${\mathrm{Nd}}_{4}{\mathrm{Ni}}_{3}{\mathrm{O}}_{8}$ at different temperatures from 300 down to 5 K over a broad frequency range. The conductivity is decomposed infrared-active phonons, far-infrared band $\ensuremath{\alpha}$, mid-infrared $\ensuremath{\beta}$, and high-energy absorption edge. By comparing measured first-principles calculations response other nickelates, we find that features evident charge-stripe fluctuations....
It outlines influencing factors of photocatalytic CO 2 reduction coupled with water oxidation, along catalytic mechanisms and performance enhancement strategies.
Among the 3d transition metal ions doped polar Ni3TeO6, Mn-doped Ni3TeO6 has stimulated great interest due to its high magnetic ordering temperature and complex phases, but mechanism of magnetoelectric (ME) coupling is far from understood. Herein we report our systematic investigation chemical control magnetism, metamagnetic transition, ME properties Ni3-xMnxTeO6 single crystals in field (H) up 52 T. We present a previously unreported weak ferromagnetic behavior appeared ab plane below 9.5 K...
Abstract The Cretaceous Yuhuashan igneous complex contains abundant xenoliths of high‐grade metamorphic rocks, with the assemblage garnet ± hypersthene + biotite plagioclase K‐feldspar quartz. in these samples has high TiO 2 (>3.5%), indicating high‐ T metamorphism (623–778 °C). P–T calculations for two felsic granulites indicate that peak took place at 880–887 °C and 0.64–0.70 GP a, low pressure/high temperature ( LP ‐ HT ) granulite facies. Phase equilibrium modelling gives conditions a...
The optical properties of $\mathrm{K}{\mathrm{Ca}}_{2}{\mathrm{Fe}}_{4}{\mathrm{As}}_{4}{\mathrm{F}}_{2}$ (K12442, ${T}_{c}=33.5$ K) and $\mathrm{K}{\mathrm{Ca}}_{2}{({\mathrm{Fe}}_{0.95}{\mathrm{Ni}}_{0.05})}_{4}{\mathrm{As}}_{4}{\mathrm{F}}_{2}$ (Ni-K12442, ${T}_{c}=29$ have been examined at a large number temperatures. For both samples, nodeless superconducting gap is clearly observed in the conductivity 5 K. $\mathrm{\ensuremath{\Delta}}\ensuremath{\simeq}8.7$ meV...
Two-dimensional (2D) transition metal chalcogenides have attracted enormous attention due to their stunning properties and great prospects for applications. Most of the reported 2D materials layered structure, non-layered are rare. Particularly, chromium highly complexed in terms structural phases. Researches on representative chalcogenides, Cr2S3and Cr2Se3, insufficient most them focus individual crystal grains. In this study, large-scale Cr2Se3films with controllable thickness successfully...
Hubnerite MnWO4 is a highly frustrated magnetic compound that has been known for its multiferroic properties. The intrinsic connection of ferroelectric polarization and magnetically structure allows an opportunity to probe the stability structures against perturbations by means measuring polarization. In this work, we investigate Mn1 − 2xIrxWO4 low-temperature (T) collinear antiferromagnetic (AF1) phase Ir substitution, considering strong spin-orbital coupling Ir4+ would enhance single-ion...
In this work, we investigate the multiferroic phase stability against 4d Ru substitution of 3d Mn in Mn1−xRuxWO4+δ. The results both Ru3+ and Ru4+ occupations at sites, while oxygen interstitials lattice are expected owing to charge neutrality requirement. It is suggested that local electric dipoles as induced by valence variations cancel with each others, making no contribution ferroelectric polarization. Ru-substitution distortion chemical disorder may be responsible for enhanced AF2 over...
The pressure-induced color change in the nitrogen-doped lutetium hydride has triggered extensive discussions about underlying physics. Here, we study optical response of LuH$_{2 \pm x}$N$_{y}$ a broad frequency range at ambient pressure and its evolution with visible spectral range. broad-band spectra reveal Drude component associated intra-band electronic transitions two Lorentz components (L1 L2) arising from inter-band transitions. application causes weight transfer L1 to component,...