A5101813090- 2D Materials and Applications
- Graphene research and applications
- Topological Materials and Phenomena
- Electronic and Structural Properties of Oxides
- MXene and MAX Phase Materials
- Advancements in Battery Materials
- Chalcogenide Semiconductor Thin Films
- ZnO doping and properties
- Fuel Cells and Related Materials
- Advanced battery technologies research
- Supercapacitor Materials and Fabrication
- Quantum Dots Synthesis And Properties
- Heusler alloys: electronic and magnetic properties
- Magnetic Properties and Applications
- Advanced Battery Materials and Technologies
- Advanced biosensing and bioanalysis techniques
- Magnetic Field Sensors Techniques
- Copper-based nanomaterials and applications
- Advancements in Semiconductor Devices and Circuit Design
- Electrocatalysts for Energy Conversion
- Diamond and Carbon-based Materials Research
- Crystal Structures and Properties
- Organic and Molecular Conductors Research
- Evaluation Methods in Various Fields
- Inorganic Chemistry and Materials
Advanced Institute of Materials Science
2019-2025
Tohoku University
2019-2025
Affiliated Hospital of Youjiang Medical University for Nationalities
2024
Taiyuan University of Technology
2024
Central South University
2017-2023
South China Normal University
2022
Shenyang Institute of Engineering
2019
Nanjing University
2015-2017
Collaborative Innovation Center of Advanced Microstructures
2015-2017
National Laboratory of Solid State Microstructures
2016
We report the detailed electronic structure of WTe$_2$ by high resolution angle-resolved photoemission spectroscopy. Unlike simple one electron plus hole pocket type Fermi surface topology reported before, we resolved a rather complicated WTe$_2$. Specifically, there are totally nine pockets, including at Brillouin zone center $\Gamma$, and two pockets on each side $\Gamma$ along $\Gamma$-$X$ direction. Remarkably, have observed circular dichroism in our spectra, which suggests that orbital...
In the fundamental understanding of magnetic interactions between atoms in solids, crystal lattice is one key parameters.As effective tool for controlling using tensile stress limited, there are only few demonstrations control properties with expanding structure.Here, we observe that Curie temperature (Tc) quasi two-dimensional Cr2Ge2Te6 NiO overlayer doubles from ~60 K to ~120 K, describe a clear correlation expansion, which characterized by several probes and computational approaches,...
Tungsten ditelluride (WTe2) is a semi-metallic layered transition metal dichalcogenide with stable distorted 1T phase. The reduced symmetry of this system leads to in-plane anisotropy in various materials properties. We have systemically studied the Raman modes few-layer and bulk WTe2 by angle-dependent polarized spectroscopy (ADPRS). Ten are clearly resolved. Their intensities show periodic variation sample rotating. identify symmetries detected quantitatively analyzing ADPRS results based...
WTe2 is provoking immense interest owing to its extraordinary properties, such as large positive magnetoresistance, pressure-driven superconductivity and possible type-II Weyl semimetal state. Here we report results of high-pressure synchrotron X-ray diffraction (XRD), Raman electrical transport measurements on WTe2. Both the XRD reveal a structural transition upon compression, starting at 6.0 GPa completing above 15.5 GPa. We have determined that lattice symmetry monoclinic 1T′ with space...
Magnetism in two-dimensional van der Waals materials has received significant attention recently. The Curie temperature reported for these materials, however, so far remained relatively low. Here, we measure magneto-optical Kerr effects under a perpendicular magnetic field ferromagnet Cr2Ge2Te6 and its heterostructures with antiferromagnetic insulator NiO. We observe notable increase both anisotropy Cr2Ge2Te6/NiO compared to those Cr2Ge2Te6. Measurements on the same exfoliated flake (on...
Abstract The recently discovered two-dimensional (2D) semimetal 1 T´-MoTe 2 exhibits colossal magnetoresistance and superconductivity, driving a strong research interest in the material’s quantum phenomena. Unlike typical hexagonal structure found many 2D materials, lattice has in-plane anisotropy. A full understanding of anisotropy is necessary for fabrication future devices which may exploit these topological properties, yet detailed study currently lacking. While angle resolved Raman...
WTe<sub>2</sub>, which is an orthorhombic semimetal crystallized in Td phase, exhibts distinct in-plane anisotropy. The Raman modes depict different anisotropic response by rotating the incident polarization under excitation wavelengths.
Heterostructures composed of the intrinsic magnetic topological insulator MnBi2Te4 and its nonmagnetic counterpart Bi2Te3 host distinct surface electronic band structures depending on stacking order exposed termination. Here, we probe ultrafast dynamical response MnBi4Te7 following near-infrared optical excitation using time- angle-resolved photoemission spectroscopy disentangle from bulk dynamics based density functional theory slab calculations surface-projected structure. We gain access...
Modification of the electronic structure quantum matter by ad atom deposition allows for directed fundamental design and magnetic properties. This concept is utilized in present study order to tune surface topological insulators based on MnBi2 Te4 . The bands these systems are typically strongly electron-doped hybridized with a manifold states that place salient out reach electron transport practical applications. In this study, micro-focused angle-resolved photoemission spectroscopy...
Composite bipolar plates (BPs) hinder their application in proton exchange membrane fuel cells (PEMFC) because of poor conductivity and mechanical properties. Nanofillers can effectively solve this problem but often have a limited effect due to easy agglomeration. In work, continuous mesh carboxylated multi-walled carbon nanotube (MWCNT) coating on the surface graphite was synthesized by chemical vapor deposition (CVD) carboxylation modification, composite BPs were prepared molding using...
Silicon, known for its high theoretical capacity and abundant resources, is regarded as one of the most promising anode materials lithium-ion batteries (LIBs). However, application silicon limited by huge expansion poor electricity silicon. Herein, a novel free-standing Si/C (noted Si/CNFs/CNTs) synthesized combining electrospinning in situ chemical vapor deposition, which Si nanoparticles are composited with conducting dual-network composed carbon nanofibers (CNFs) deposited nanotubes...
An efficient, self-powered ultraviolet photoelectrochemical photodetector based on n-GaN/p-Cu2O core–shell nanowire p–n heterojunctions is demonstrated. The photocurrent under solar light 2–3 times larger than that for GaN nanowires. photocurrents the and fraction are comparable, 100 µA/cm2 density. broad visible part about 3% of light. responsivity specific detectivity reach 961.5 µA/W 5.35 × 109 Jones light, respectively. rise/fall 42/65 ms. This understood by efficient photocarrier...
The search of novel topological states, such as the quantum anomalous Hall insulator and chiral Majorana fermions, has motivated different schemes to introduce magnetism into insulators. A promising scheme is using magnetic proximity effect (MPE), where a ferromagnetic magnetizes insulator. Most these heterostructures are synthesized by growth techniques which prevent mixing many available insulators due difference in conditions. Here, we demonstrate that MPE can be obtained stacked via dry...
We study the effects of interfacing van der Waals ferromagnet Cr2Ge2Te6 with oxide layers, such as NiO and MgO, in a few different configurations. For this, magnetic hysteresis curves, obtained by magneto optical Kerr effect, flakes similar thicknesses were evaluated. Compared to properties bare Cr2Ge2Te6, we observed an increased perpendicular anisotropy enhanced Curie temperature Cr2Ge2Te6/NiO heterostructure. In contrast, report little or no change Cr2Ge2Te6/MgO where was exfoliated on...
Optical phonon engineering through nonlinear effects has been utilized in ultrafast control of material properties. However, optical phonons typically exhibit rapid decay due to strong mode-mode couplings, limiting their effectiveness temperature or frequency sensitive applications. In this study, we report the observation long-lived spontaneous formation combs van der Waals CrXTe$_3$ (X=Ge, Si) using high-resolution Raman scattering. Unlike conventional phonons, highest $A_g$ mode...
Correction for ‘The polarization-dependent anisotropic Raman response of few-layer and bulk WTe<sub>2</sub> under different excitation wavelengths’ by Qingjun Song <italic>et al.</italic>, <italic>RSC Adv.</italic>, 2016, <bold>6</bold>, 103830–103837.