A5101901335- Magnetic Properties of Alloys
- Magnetic and transport properties of perovskites and related materials
- Rare-earth and actinide compounds
- Magnetic properties of thin films
- Advanced Condensed Matter Physics
- Advancements in Battery Materials
- Magnetic Properties and Applications
- Multiferroics and related materials
- Advanced Battery Materials and Technologies
- Ferroelectric and Piezoelectric Materials
- Nuclear Physics and Applications
- Advanced Thermoelectric Materials and Devices
- Thermal Expansion and Ionic Conductivity
- Atomic and Subatomic Physics Research
- 2D Materials and Applications
- Thermal properties of materials
- Heusler alloys: electronic and magnetic properties
- Electronic and Structural Properties of Oxides
- Hydrogen Storage and Materials
- Physics of Superconductivity and Magnetism
- Microwave Dielectric Ceramics Synthesis
- Supercapacitor Materials and Fabrication
- Extraction and Separation Processes
- Advanced NMR Techniques and Applications
- Theoretical and Computational Physics
Institute of Physics
2015-2024
Chinese Academy of Sciences
2015-2024
China Spallation Neutron Source
2016-2024
University of Chinese Academy of Sciences
2018-2024
Songshan Lake Materials Laboratory
2019-2024
Spallation Neutron Source
2024
Czech Academy of Sciences, Institute of Physics
2017-2024
Institute of High Energy Physics
2017-2024
National Laboratory for Superconductivity
2010-2020
State Key Laboratory of Magnetism
1995-2018
Here, we report on the experimental discovery of biskyrmion magnetic nanodomains at RT and observation a biskyrmion-derived topological Hall effect (THE) in centrosymmetric hexagonal MnNiGa magnet. Using phase reconstruction technique based transport-of-intensity equation (TIE), established texture spin. Results from Lorentz transmission electron microscopy (TEM) revealed that is stable over much wider temperature range (100 K to ~340K) larger field our material than skyrmion-hosting bulk...
Abstract Li 2 MnO 3 is the parent compound of well‐studied Li‐rich Mn‐based cathode materials x ·(1‐ )LiMO for high‐energy‐density Li‐ion batteries. has a very high theoretical capacity 458 mA h g −1 extracting Li. However, delithiation and lithiation behaviors corresponding structure evolution mechanism in both are still not clear. In this research, atomic structures before after partial re‐lithiation observed with spherical aberration‐corrected scanning transmission electron microscopy...
Solid electrolytes are highly important materials for improving safety, energy density, and reversibility of electrochemical storage batteries. However, it is a challenge to modulate the coordination structure conducting ions, which limits improvement ionic conductivity hampers further development practical solid electrolytes. Here, we present skeleton-retained cationic exchange approach produce high-performance electrolyte Li 3 Zr 2 Si PO 12 stemming from NASICON-type superionic conductor...
Lattice-oxygen redox (l-OR) has become an essential companion to the traditional transition-metal (TM) charge compensation achieve high capacity in Li-rich cathode oxides. However, understanding of l-OR chemistry remains elusive, and a critical question is structural effect on stability reactions. Herein, coupling between structure dimensionality studied. We reveal that evolution oxygen-lattice upon TM oxides which have three-dimensional (3D)-disordered cation framework relatively stable,...
Through first-principles calculations, we report on the phonon-limited transport properties of two-dimensional (2D) hexagonal MSe (M = Ge, Sn, and Pb) compounds, which can be seen as a new family 2D group-IV selenides established by isovalent substitutions germanium tellurium in layered ${\mathrm{Ge}}_{4}{\mathrm{Se}}_{3}\mathrm{Te}$ phase [Angew. Chem. Inter. Edit. 56 10204 (2017)]. We find that PbSe exhibits low values sound velocity (800--2030 m/s), large $\mathrm{Gr}\stackrel{\ifmmode...
Plasmon induced water splitting is a promising research area with the potential for efficient conversion of solar to chemical energy, yet its atomic mechanism not well understood. Here, ultrafast electron–nuclear dynamics on gold nanoparticles upon exposure femtosecond laser pulses was directly simulated using real time time-dependent density functional theory (TDDFT). Strong correlation between intensity, hot electron transfer, and reaction rates has been identified. The rate dependent only...
Abstract Multiferroics materials, which exhibit coupled magnetic and ferroelectric properties, have attracted tremendous research interest because of their potential in constructing next-generation multifunctional devices. The application single-phase multiferroics is currently limited by usually small magnetoelectric effects. Here, we report the realization giant effects a Y-type hexaferrite Ba 0.4 Sr 1.6 Mg 2 Fe 12 O 22 single crystal, exhibits record-breaking direct converse coefficients...
Combining the first-principles density functional method and crystal structure prediction techniques, we report a series of hexagonal two-dimensional transition metal borides including Sc<sub>2</sub>B<sub>2</sub>, Ti<sub>2</sub>B<sub>2</sub>, V<sub>2</sub>B<sub>2</sub>, Cr<sub>2</sub>B<sub>2</sub>, Y<sub>2</sub>B<sub>2</sub>, Zr<sub>2</sub>B<sub>2</sub>, Mo<sub>2</sub>B<sub>2</sub>.
In this study, we report two new Mo<sub>2</sub>B<sub>2</sub> monolayers and investigate their stabilities, electronic structures, lattice dynamics, properties as anode materials for energy storage by using the crystal structure prediction technique first-principles method.
Abstract Due to their numerous advantages, such as high specific capacity, lithium–sulfur batteries (Li–S batteries) have attracted much attention next‐generation energy storage systems. To meet future needs for commercial application, Li–S will require both improved cycle life and density. It is of critical importance understand the fundamental mechanisms in systems further improve overall battery performance. Various advanced characterization techniques, over past few years, proven...
Abstract Increasing the charging cut‐off voltage (e.g., 4.6 V) to extract more Li ions are pushing LiCoO 2 (LCO) cathode achieve a higher energy density. However, an inhomogeneous cycled bulk‐to‐surface distribution, which is closely associated with enhanced extracted ions, usually ignored, and severely restricts design of long lifespan high LCO. Here, strategy by constructing artificial solid–solid diffusion environment on LCO's surface proposed homogeneous distribution upon cycling. The...
ABSTRACT Crystalline solids exhibiting inherently low lattice thermal conductivity (κL) are of great importance in applications such as thermoelectrics and barrier coatings. However, κL cannot be arbitrarily is limited by the minimum related to phonon dispersions. In this work, we report liquid-like transport a well-ordered crystalline CsAg5Te3, which exhibits an extremely value ∼0.18 Wm−1K−1. On basis first-principles calculations inelastic neutron scattering measurements, find that there...
A multi-slit very small angle neutron scattering (MS-VSANS) instrument has been finally accepted at the China Spallation Neutron Source (CSNS). It is first spallation source based VSANS instrument. MS-VSANS a good signal-to-noise ratio and can cover wide vector magnitude range from 0.00028 to 1.4 Å
The desire for intrinsically low lattice thermal conductivity (κL) in thermoelectrics motivates numerous efforts on understanding the microscopic mechanisms of heat transport solids. Here, based theoretical calculations, we demonstrate that α-MgAgSb hosts low-energy localized phonon bands and avoided crossing rattler modes, which coincides with inelastic neutron scattering result. Using two-channel dynamical approach, find, besides conventional contribution (∼70% at 300 K) from particlelike...
A novel hard magnetic compound series with composition Sm2Fe14Ga3Cx (x=0, 0.5, 1.0, 1.5, 2.0, and 2.5) was prepared by arc melting. The carbides crystallize in the rhombohedral Th2Zn17-type structure are single phase except for Sm2Fe14Ga3 Sm2Fe14Ga3C0.5 which contain some amounts of α-Fe. substitution Ga is found to play an important role stability high carbon rare-earth iron compounds 2:17-type structure. Curie temperatures 200–240 K higher than that Sm2Fe17. All x=0–2.5 exhibit easy c-axis...
Abstract All‐Mn‐based Li‐rich cathodes Li 2 MnO 3 have attracted extensive attention because of their cost advantage and ultrahigh theoretical capacity. However, the unstable anionic redox reaction (ARR), which involves irreversible oxygen releases, causes declines in cycling capacity intercalation potential, thus hindering practical applications. Here, it is proposed that introducing stacking‐fault defects into can localize lattice evolutions stabilize ARR, eliminating releases. The...
Due to a high energy density, layered transition‐metal oxides have gained much attention as the promising sodium‐ion batteries cathodes. However, they readily suffer from multiple phase transitions during Na extraction process, resulting in large lattice strains which are origin of cycled‐structure degradations. Here, we demonstrate that Na‐storage can be reduced by pushing charge transfer on anions (O 2− ). Specifically, designed O3‐type Ru‐based model compound, shows an increased anions,...