A5036593986- Magnetic and transport properties of perovskites and related materials
- Advanced Condensed Matter Physics
- Multiferroics and related materials
- Advancements in Battery Materials
- Electronic and Structural Properties of Oxides
- Semiconductor materials and devices
- Advanced Battery Materials and Technologies
- Ferroelectric and Piezoelectric Materials
- 2D Materials and Applications
- Magnetic properties of thin films
- Supercapacitor Materials and Fabrication
- Graphene research and applications
- ZnO doping and properties
- MXene and MAX Phase Materials
- Advanced Memory and Neural Computing
- Thermal Expansion and Ionic Conductivity
- Magnetic Properties and Applications
- Advanced Electron Microscopy Techniques and Applications
- Dielectric properties of ceramics
- Electron and X-Ray Spectroscopy Techniques
- Catalytic Processes in Materials Science
- Physics of Superconductivity and Magnetism
- Diamond and Carbon-based Materials Research
- Acoustic Wave Resonator Technologies
- Semiconductor materials and interfaces
Institute of Physics
2016-2025
Chinese Academy of Sciences
2016-2025
Fudan University
1998-2025
State Key Laboratory of Surface Physics
2020-2025
University of Chinese Academy of Sciences
2017-2021
Czech Academy of Sciences, Institute of Physics
2021
National Laboratory for Superconductivity
2014-2018
The University of Tokyo
2014
Lanzhou University of Technology
2008-2011
MXenes represent a large family of functionalized two-dimensional (2D) transition-metal carbides and carbonitrides. However, most the understanding on their unique structures applications stops at theoretical suggestion lack experimental support. Herein, surface structure intercalation chemistry Ti3C2X are clarified atomic scale by aberration-corrected scanning transmission electron microscope (STEM) density functional theory (DFT) calculations. The STEM studies show that groups (e.g.,...
Biological synapses store and process information simultaneously by tuning the connection between two neighboring neurons. Such functionality inspires task of hardware implementation neuromorphic computing systems. Ionic/electronic hybrid three-terminal memristive devices, in which channel conductance can be modulated according to history applied voltage current, provide a more promising way emulating substantial reduction complexity energy consumption. 2D van der Waals materials with single...
Two-dimensional (2D) transition-metal dichalcogenides hold enormous potential for applications in electronic and optoelectronic devices. Their distinctive chemical properties are closely related to the structure intercalation chemistry. Herein, controversial phase transition from semiconductive 2H metallic 1T occupancy of intercalated sodium (Na) upon electrochemical Na into MoS2 clarified at atomic scale by aberration-corrected scanning transmission electron microscope. In addition, a...
Abstract The Li‐rich layer‐structured oxides are regarded as one of the most promising cathode materials for their high energy density but suffer from severe problems such capacity fading, poor rate performance, and continuous potential dropping. These issues addressed here by surface doping niobium (Nb) other heavy ions in a Mn‐based layered oxide, Li 1.2 Mn 0.54 Ni 0.13 Co O 2 . doped verified to be located Li‐layer near oxide surface; they bind slabs via strong NbO bonds “inactivate”...
The search of novel quasi-1D materials is one the important aspects in field material science. Toroidal moment, order parameter ferrotoroidic order, can be generated by a head-to-tail configuration magnetic moment. It has been theoretically proposed that 1D dimerized and antiferromagnetic (AFM)-like spin chain hosts ferrotoroidicity toroidal moment composed only two antiparallel spins. Here, authors report candidate Ba6 Cr2 S10 with such theoretical model chain. structure consists unique...
Resistive switching processes in HfO2 are studied by electron holography and situ energy-filtered imaging. The results show that oxygen vacancies gradually generated the oxide layer under ramped electrical bias, finally form several conductive channels connecting two electrodes. It also shows process occurs at top interface of hafnia layer. As a service to our authors readers, this journal provides supporting information supplied authors. Such materials peer reviewed may be re-organized for...
Abstract The simple ABO 3 and A-site-ordered AA′ B 4 O 12 perovskites represent two types of classical perovskite functional materials. There are well-known with ferroelectric properties, while there is still no report ferroelectricity due to symmetry breaking transition in quadruple perovskites. Here we the high pressure synthesis an PbHg Ti , only known that transforms from high-temperature centrosymmetric paraelectric phase low-temperature non-centrosymmetric phase. coordination chemistry...
Abstract Li‐rich layered metal oxides are one type of the most promising cathode materials in lithium‐ion batteries but suffer from severe voltage decay during cycling because continuous transition (TM) migration into Li layers. A oxide 1.2 Ti 0.26 Ni 0.18 Co Mn O 2 (LTR) is hereby designed, which some 4+ cations intrinsically present The native Li–Ti cation mixing structure enhances tolerance for structural distortion and inhibits TM ions TMO slabs (de)lithiation. Consequently, LTR exhibits...
Grouping different transition metal oxides together by interface engineering is an important route toward emergent phenomenon. While most of the previous works focused on effects in perovskite/perovskite heterostructures, here we reported a symmetry mismatch-driven spin reorientation perpendicular magnetic anisotropy perovskite/brownmillerite which scarcely seen tensile heterostructures. We show that alternately stacking perovskite La2/3Sr1/3MnO3 and brownmillerite LaCoO2.5 causes strong...
Abstract Lithium‐rich layered oxides are promising candidate cathode materials for the Li‐ion batteries with energy densities above 300 Wh kg −1 . However, issues such as voltage hysteresis and decay hinder their commercial applications. Due to entanglement of transition metal (TM) migration anionic redox upon lithium extraction at high potentials, it is difficult recognize origin these in conventional Li‐rich oxides. Herein, Li 2 MoO 3 chosen since prototype material uncover reason TM can...
Lithium-rich manganese-based layered oxide cathodes (LLOs) with oxygen redox reactions are considered to be potential candidates for the next generation of high-energy-density Li-ion batteries. However, process that enables ultrahigh specific capacity usually leads irreversible O2 release and cation migration, which induce structure degradation severe capacity/voltage losses thus limit commercial application LLOs. Herein, we successfully synthesized chlorine (Cl)-doped Co-free LLOs...
Li-rich layer-structured oxides are considered promising cathode materials for their specific capacities above 250 mAh·g-1. However, the drawbacks such as poor rate performance, fast capacity fading, and continuous transition metal (TM) migration into Li layer hinder commercial applications. To address these issues, surface doping of Ti Zr was conducted to Li- Mn-rich layered oxide (LMR), Li1.2Mn0.54Ni0.13Co0.13O2. The drop average discharge potentials Ti- Zr-doped LMR reduced by 593 346 mV...
A series of ordered photoanodic architectures (including TiO2 nanotube arrays (TNT), ZnO nanorods, ZnO/TiO2 core/shell nanostructures) for CdS/CdSe sensitized solar cells (QDSCs), were fabricated directly on transparent conductive oxide glasses by a facile sol–gel assisted template process. The morphologies, optical and electrical properties TNTs co-sensitized have been demonstrated. effect CdSe deposition time the cell performance was clarified, growth mechanism quantum dots surface has...
We report the electrical transport properties of ferrimagnetic Mn4N (001) epitaxial thin films grown by pulsed laser deposition on MgO substrates. The were tetragonally distorted with a ratio out-of-plane to in-plane lattice constants 0.987 and showed perpendicular magnetic anisotropy an effective constant 0.16 MJ/m3, which is comparable that recently reported molecular-beam-epitaxy-grown film. exhibited metallic room temperature resistivity 125 μΩ cm in addition large anomalous Hall effect...
Cu nanowires (Copper nanowires) have attracted lots of attention recently due to their potential applications in transparent electrodes, surface enhanced Raman scattering (SERS) based sensors, and solar cells. However, as the composition morphology severely influence performance devices on them, facile modification methods need be developed. Herein, we propose a room-temperature, time-saving aqueous solution method, through which clean with small Ag nanoparticles decorating around them could...
A new oxide, LaMn3Ni2Mn2O12, was prepared by high-pressure and high-temperature synthesis methods. The compound crystallizes in an AA′3B2B′2O12-type A-site B-site ordered quadruple perovskite structure. charge combination is confirmed to be LaMn3+3Ni2+2Mn4+2O12, where La Mn3+ are 1:3 at the A′ sites Ni2+ Mn4+ also distributed B B′ orderly fashion a rocksalt-type manner, respectively. G-type antiferromagnetic ordering originating from A′-site sublattice found occur TN ≈ 46 K. Subsequently,...
The domain morphology in the growth of transition-metal dichalcogenides (TMDCs) is mostly triangular but rarely dendritic. Here, we report a robust chemical vapor deposition method to fabricate atomic-thin 2H-phase MoS2 dendrites on several single-crystalline substrates with different lattice structures, such as rutile-TiO2(001), SrTiO3(001), and sapphire(0001). It found that by tuning concentration Mo adatoms, domains these evolves from tridentate at low semicompact fractal an intermediate...
Anionic redox is an effective way to increase the capacity of cathode materials. Na2Mn3O7 [Na4/7[Mn6/7□1/7]O2, □ for transition metal (TM) vacancies] with native and ordered TM vacancies can conduct a reversible oxygen be promising high-energy material sodium-ion batteries (SIBs). However, its phase at low potentials (∼1.5 V vs Na+/Na) induces potential decays. Herein, magnesium (Mg) doped on form disordered Mn/Mg/□ arrangement in layer. The Mg substitution suppresses oxidation ∼4.2 by...