A5007614908- Magnetic and transport properties of perovskites and related materials
- Electronic and Structural Properties of Oxides
- Advanced Condensed Matter Physics
- Multiferroics and related materials
- Ferroelectric and Piezoelectric Materials
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Graphene research and applications
- Magnetic properties of thin films
- Quantum and electron transport phenomena
- Topological Materials and Phenomena
- 2D Materials and Applications
- Magnetic Properties of Alloys
- Surface and Thin Film Phenomena
- Semiconductor materials and devices
- Physics of Superconductivity and Magnetism
- Electron and X-Ray Spectroscopy Techniques
- ZnO doping and properties
- Advanced Memory and Neural Computing
- Theoretical and Computational Physics
- Advancements in Solid Oxide Fuel Cells
- Advanced Materials Characterization Techniques
- Rare-earth and actinide compounds
- High-pressure geophysics and materials
- Acoustic Wave Resonator Technologies
ShanghaiTech University
2017-2025
Tianjin University of Technology
2025
Hubei Normal University
2022
University of Science and Technology of China
2011-2020
CAS Key Laboratory of Urban Pollutant Conversion
2014-2020
Hefei National Center for Physical Sciences at Nanoscale
2011-2020
National Synchrotron Radiation Laboratory
2017-2020
University of Connecticut
2020
QuantumCTek (China)
2019
Hefei University
2014-2018
Graphene has attracted a lot of research interest owing to its exotic properties and wide spectrum potential applications. Chemical vapor deposition (CVD) from gaseous hydrocarbon sources shown great promises for large-scale graphene growth. However, high growth temperature, typically 1000 °C, is required such Here we demonstrate revised CVD route grow on Cu foils at low adopting solid liquid feedstocks. For PMMA polystyrene precursors, centimeter-scale monolayer films are synthesized...
Superlattices of $({\mathrm{LaMnO}}_{3}{)}_{2n}/({\mathrm{SrMnO}}_{3}{)}_{n}$ ($1\ensuremath{\le}n\ensuremath{\le}5$), composed the gapped insulators ${\mathrm{LaMnO}}_{3}$ and ${\mathrm{SrMnO}}_{3}$, undergo a metal-insulator transition as function $n$, being metallic for $n\ensuremath{\le}2$ insulating $n\ensuremath{\ge}3$. Measurements transport, magnetization, polarized neutron reflectivity reveal that ferromagnetism is relatively uniform in state, strongly modulated high suppressed...
Significance Ferromagnetic insulators are highly needed as the necessary components in developing next-generation dissipationless quantum-spintronic devices. Such materials rare, and those high symmetric ones without chemical doping available so far only work below 16 K. Here we demonstrate a tensile-strained LaCoO 3 film to be strain-induced high-temperature ferromagnetic insulator. Both experiments first-principles calculations demonstrated that tensile-strain–supported ferromagnetism...
We use resonant soft-x-ray scattering (RSXS) to study the electronic reconstruction at interface between Mott insulator LaMnO3 and band SrMnO3. Superlattices of these two insulators were shown previously have both ferromagnetism metallic tendencies [Koida, Phys. Rev. B 66, 144418 (2002)10.1103/PhysRevB.66.144418]. By studying a judiciously chosen superlattice reflection, we show that density states exhibits pronounced peak Fermi level, similar predicted in related titanate superlattices by...
We have found ferromagnetism in epitaxially grown superlattices of CaRuO(3)/CaMnO(3) that arises one unit cell at the interface. Scanning transmission electron microscopy and energy loss spectroscopy indicate difference magnitude Mn valence states between center CaMnO(3) layer interface region is consistent with double exchange interaction among ions Polarized neutron reflectivity thickness dependence bias field together interfacial only limited to each The moment alternates 1 μ(B)/interface...
Graphene has attracted intense research interest due to its exotic properties and potential applications. Chemical vapor deposition (CVD) on Cu foils shown great promises for macroscopic growth of high-quality graphene. By delicate design control the CVD conditions, here we demonstrate that a nonequilibrium steady state can be achieved in gas phase along tube, is, active species from methane cracking increase quantity, which results thickness continually graphene grown independently at...
Engineering magnetic anisotropy in two-dimensional systems has enormous scientific and technological implications. The uniaxial universally exhibited by magnets only two stable spin directions, demanding 180 degrees switching between states. We demonstrate a novel eightfold SrRuO3 monolayers inducing reorientation (SrRuO3)1/(SrTiO3)N superlattices, which the easy axis of Ru spins is transformed from <001> direction (N = 1 2) to <111> directions 3, 4 5). This enables 71 109 monolayers,...
Polarized neutron reflectivity measurements of a ferromagnetic ${[{({\text{LaMnO}}_{3})}_{11.8}/{({\text{SrMnO}}_{3})}_{4.4}]}_{6}$ superlattice reveal modulated magnetic structure with an enhanced magnetization at the interfaces where ${\text{LaMnO}}_{3}$ was deposited on ${\text{SrMnO}}_{3}$ (LMO/SMO). However, opposite (SMO/LMO) are found to have reduced moment. The asymmetry is accompanied by corresponding in lateral structural roughness two observed via electron microscopy,...
The interfacial electronic structure characterization of a m×(LaMnO3)/n×(SrTiO3) superlattice based on scanning transmission electron microscopy and energy loss spectroscopy. Evidence band alignment transfer are presented the observation O K edge individual transition metal oxygen atomic columns. Electron probe aberration correction was essential for high spatial resolution mapping states.
The combination of small coercive fields and weak magnetic anisotropy makes soft ferromagnetic films extremely useful for nanoscale devices that need to easily switch spin directions. However, ferromagnets are relatively rare, particularly in ultrathin with thicknesses a few nanometers or less. We have synthesized large-area, high-quality, freestanding LaMnO3 on Si found unexpected ferromagnetism along both the in-plane out-of-plane directions when film thickness was reduced 4 nm. argue...
Using circularly polarized x rays, we compare the electronic and magnetic properties of a ${\mathrm{La}}_{2∕3}{\mathrm{Sr}}_{1∕3}\mathrm{Mn}{\mathrm{O}}_{3}(\mathrm{LSMO})∕\mathrm{Sr}\mathrm{Ti}{\mathrm{O}}_{3}(\mathrm{STO})$ modified $\mathrm{LSMO}∕\mathrm{La}\mathrm{Mn}{\mathrm{O}}_{3}(\mathrm{LMO})∕\mathrm{STO}$ interface. technique x-ray resonant scattering, can probe interfaces complicated layered structures quantitatively model depth-dependent profiles as function distance from...
For polar/nonpolar heterostructures, Maxwell's theory dictates that the electric potential in polar components will increase divergently with film thickness. LaAlO3/SrTiO3, a conceptually intriguing route, termed charge reconstruction, has been proposed to avert such "polar catastrophe". The existence of LaAlO3 is prerequisite for validity reconstruction picture, yet date, its direct measurement remains major challenge. Here we establish unambiguously residual ultrathin films on SrTiO3,...
From both fundamental and technical points of view, a precise control the layer number graphene samples is very important. To reach this goal, atomic scale mechanisms multilayer growth on metal surfaces should be understood. Although it geometrically favorable pathway to transport carbon species interface then form new there, penetration overlayer not chemically straightforward process. In study, possibility different active penetrate Cu(111) surface investigated based first principles...
Deep-ultraviolet nonlinear optical (DUV NLO) crystals play a vitally important role in many scientific and technological fields, yet their rational design remains an ongoing challenge. Here, through utilizing the ordered structure design, new KBe2BO3F2-like DUV transparent NLO crystal Cs2KY(B3O6)2 has been successfully designed synthesized, which we first use largest π-conjugated B3O6 functional groups to substitute BO3 maximize second-harmonic generation (SHG) response utilize K/YO6...
Abstract Deep‐ultraviolet nonlinear optical (DUV NLO) crystals play a vitally important role in many scientific and technological fields, yet their rational design remains an ongoing challenge. Here, through utilizing the ordered structure design, new KBe 2 BO 3 F ‐like DUV transparent NLO crystal Cs KY(B O 6 ) has been successfully designed synthesized, which we first use largest π ‐conjugated B functional groups to substitute maximize second‐harmonic generation (SHG) response utilize K/YO...
Abstract A practical photocatalyst should be able to integrate together various functions including the extended solar conversion, a feasible and economic recyclability above room temperature operation potential, et al. , in order fulfill spreading application needs nowadays. In this report, multifunctional single-phase which possesses high photoactivity into near infrared region, an easy magnetic stability was developed by doping Co new layer-structured Bi 7 Fe 3 Ti O 21 material. Light...
Abstract A remarkable exchange bias effect arising from the temperature-dependent interaction among ferromagnetic-like cluster glasses and antiferromagnetic regions was observed in a newly developed single-phase multiferroic compound of Bi 10 Fe 6 Ti 3 O 30 which has nine-layer Aurivillius structure. Inhomogeneous distribution magnetic ions inside this long-period layered structure experimentally identified via atomic level imaging. The results confirmed presence short-range ordering (the...
A high-quality Bi<sub>2</sub>Se<sub>3</sub>/LaCoO<sub>3</sub> heterostructure is fabricated as a new TI/FMI system for investigating proximity-induced ferromagnetic phase in topological insulators.
Digital superlattices of (LaMnO3)m∕(SrMnO3)2m (m⩽3) having the same nominal composition as La1∕3Sr2∕3MnO3, an antiferromagnetic insulator, have been synthesized by means molecular beam epitaxy. All show a sharp resistive maximum at temperatures near to or higher than Néel temperature bulk La1∕3Sr2∕3MnO3. No discernible signatures magnetic ordering are observed resistivity peak for m⩽2, but m=3 has susceptibility consistent with antiferromagnet ordering, which is canted when cooled in small...