A5076105947- Physics of Superconductivity and Magnetism
- Magnetic and transport properties of perovskites and related materials
- Electronic and Structural Properties of Oxides
- Advanced Photocatalysis Techniques
- Electrocatalysts for Energy Conversion
- Advanced battery technologies research
- Gas Sensing Nanomaterials and Sensors
- Organic Electronics and Photovoltaics
- Luminescence and Fluorescent Materials
- MXene and MAX Phase Materials
- Magnetic properties of thin films
- Iron-based superconductors research
- Copper-based nanomaterials and applications
- Rare-earth and actinide compounds
- Conducting polymers and applications
- TiO2 Photocatalysis and Solar Cells
- Fuel Cells and Related Materials
- ZnO doping and properties
- Advanced Condensed Matter Physics
- Electrochemical Analysis and Applications
- Transition Metal Oxide Nanomaterials
- Characterization and Applications of Magnetic Nanoparticles
- Superconducting Materials and Applications
- Organic Light-Emitting Diodes Research
- Quantum and electron transport phenomena
The University of Texas at Dallas
2019-2023
Brookhaven National Laboratory
2021-2023
Shaanxi University of Science and Technology
2019-2021
Yale University
2021
Chinese Academy of Sciences
2016-2017
Hefei Institutes of Physical Science
2017
High Magnetic Field Laboratory
2016-2017
Shanxi Normal University
2007
Designing an excellent acidic and alkaline general-purpose hydrogen evolution electrocatalyst plays important role in promoting the development of energy field. Here, a feasible strategy is reported to use strongly coupled MoS2@sulfur molybdenum co-doped g-C3N4 (MoS2@Mo-S-C3N4) heterostructure with transferable active centers for catalytic reactions media. Research studies have shown that unsaturated S site at edge MoS2 N atom on Mo-S-C3N4 substrate are, respectively, reaction. Specifically,...
Using time-domain terahertz spectroscopy in pulsed magnetic fields up to 31 T, we measure the optical conductivity an optimally doped thin film of high-temperature superconducting cuprate ${\mathrm{La}}_{1.84}{\mathrm{Sr}}_{0.16}{\mathrm{CuO}}_{4}$. We observe systematic changes circularly polarized complex that are consistent with cyclotron absorption $p$-type charge carriers characterized by a mass $4.9{m}_{\mathrm{e}}\ifmmode\pm\else\textpm\fi{}0.8{m}_{\mathrm{e}}$ and scattering rate...
The recent observation of cyclotron resonance in optimally-doped La$_{2-x}$Sr$_x$CuO$_4$ using time-domain THz spectroscopy high magnetic field has given new possibilities for the study cuprate superconductors. One can measure mass more disordered cuprates possesing short scattering times therefore expanding to materials and dopings which quantum oscillations have not been observed. Here we present measurement carrier hole doped across a range spanning slightly underdoped ($x=0.13$) highly...
Atomic layer-by-layer molecular beam epitaxy (ALL-MBE) is a sophisticated technique to synthesize high-temperature superconductor (HTS) materials. ALL-MBE produces single-crystal HTS films with atomically smooth surfaces and interfaces, as well precise multilayer heterostructures engineered down single atomic layer level. This enables the fabrication of tunnel junctions, nanowires, nanorings, other devices interest. Our group has focused on synthesis materials science La2−xSrxCuO4 (LSCO),...
Atomic layer-by-layer molecular beam epitaxy (ALL-MBE) combined with ozone is one of the best methods to fabricate single-crystal thin films complex oxides. Cuprate such as La2−xSrxCuO4 (LSCO) a representative complex-oxide high-temperature superconductor (HTS) material. Our group utilizes this method produce high-quality HTS atomically smooth surfaces and interfaces. In addition, ALL-MBE enables us engineer multilayer heterostructures atomic precision. This allows fabrication tunnel...
We present methods to create devices that utilize the high-temperature superconductor La2-xSrxCuO4 grown by atomic layer-by-layer molecular beam epitaxy (ALL-MBE). The ALL-MBE synthesis technique provides atomically precise interfaces necessary for tunnel junctions, Josephson and dyon detection will be considered. A series of microfabrication processing steps using established techniques are given each device, their details discussed. These procedures easily extended generate more complex...
C-axis trilayer cuprate Josephson junctions are essential for basic science and digital circuit applications of high-temperature superconductors. We present a method probing the interface perfection in La2−xSrxCuO4 (LSCO)-LaSrAlO4 (LSAO)-La2−xSrxCuO4 junctions. A series LSCO-LSAO superlattices with atomically smooth surfaces sharp interfaces were grown by atomic-layer-by-layer molecular beam epitaxy (ALL-MBE) technique. have systematically varied thickness LSCO LSAO layers monolayer...
The fabrication of trilayer superconductor-insulator-superconductor (SIS) Josephson junctions with high-temperature superconductor (HTS) electrodes requires atomically perfect interfaces. Therefore, despite great interest and efforts, this remained a challenge for over three decades. Here, we report the discovery new family metastable materials, La2-xSrxZnO4 (LSZO), synthesized by atomic-layer-by-layer molecular beam epitaxy (ALL-MBE). We show that LSZO is insulating epitaxially compatible...
The mixed‐phase BiVO 4 nanosheet with different ratios of solvents was prepared by a one‐step hydrothermal method. viscosity ethylene glycol helps form homogeneous thin nanosheet, which can be compared the microstructure (deionised water and glycol). Also, both XRD Raman diagrams indicate that synthesis constitutes mixture two crystal types. possesses higher photocurrent density, smaller electron transport resistance longer lifetime. Enhanced photoelectrochemical performance attributed to...
We present a method for producing tunnel junctions from cuprate thin films grown by atomic layer-by-layer molecular beam epitaxy (ALL-MBE). Our approach utilizes microfabrication processing and relies on the atomically precise interfaces provided ALL-MBE synthesis technique. The is suitable wide range of junction dimensions materials allows more complex designs such as superconducting quantum interference devices arrays. Fully electrodes ensure that contact resistances in created this remain...
We report a Spectroscopic Imaging Scanning Tunneling Microscopy (SI-STM) study of DyBa2Cu3O7-δ (DBCO) thin film (Tc ~ 79 K) synthesized by the molecular beam epitaxy (MBE). observed an unusual transfer spectral weight in local density states (LDOS) spectra occurring only within superconducting gap. By systematic control tip-sample distance and junction resistance, we demonstrate that can be switched at nano-meter length scale. These results suggest interaction between STM tip sample alters...
Thin film samples of ZnO doped with Co were grown on sapphire substrates by pulsed laser deposition (PLD). The magnetization was measured SQUID magnetometry and the films found to be ferromagnetic at room temperature. transmission magnetic circular dichroism as a function energy temperature carrier concentrations determined from Hall effect measurements. Clear magneto‐optical signals that are in origin observed band edge conditions for optimizing discussed.