A5059177451- High-pressure geophysics and materials
- 2D Materials and Applications
- earthquake and tectonic studies
- Chalcogenide Semiconductor Thin Films
- Topological Materials and Phenomena
- Geological and Geochemical Analysis
- Phase-change materials and chalcogenides
- High Entropy Alloys Studies
- Advanced X-ray Imaging Techniques
- Advanced Semiconductor Detectors and Materials
- Fullerene Chemistry and Applications
- Carbon Nanotubes in Composites
- Luminescence Properties of Advanced Materials
- Crystallography and Radiation Phenomena
- Industrial Technology and Control Systems
- Graphene research and applications
- Organic and Molecular Conductors Research
- X-ray Diffraction in Crystallography
- Electronic and Structural Properties of Oxides
- Quantum Dots Synthesis And Properties
- Aluminum Alloy Microstructure Properties
- Aluminum Alloys Composites Properties
- Inorganic Fluorides and Related Compounds
- Perovskite Materials and Applications
- Advanced Thermoelectric Materials and Devices
Center for High Pressure Science and Technology Advanced Research
2018-2024
Institute of High Energy Physics
2016
Chinese Academy of Sciences
2016
Stony Brook University
2014
Developing light yet strong aluminum (Al)-based alloys has been attracting unremitting efforts due to the soaring demand for energy-efficient structural materials. However, this endeavor is impeded by limited solubility of other lighter components in Al. Here, we propose surmount challenge converting multiple brittle phases into a ductile solid solution Al-based complex concentrated (CCA) applying high pressure and temperature. We successfully develop face-centered cubic single-phase CCA, Al
Germanium selenide is a promising material for electronic, photovoltaic, and thermoelectric applications; however, structural phase transitions of GeSe under pressure are controversial. Combining evolutionary algorithms, density functional theory, tight-binding method, laser-heated diamond anvil cell experiments, pressure-induced thoroughly investigated. Two novel intermediate phases predicted to exist in between the well-known α-GeSe recently discovered β-GeSe high pressure. found transform...
The characteristics of topological insulators are manifested in both their surface and bulk properties, but the latter remain to be explored. Here we report signatures pressure-induced band inversion phase transitions Pb(1-x)Sn(x)Se (x=0.00, 0.15, 0.23). results infrared measurements as a function pressure indicate closing reopening gap well maximum free carrier spectral weight. enhanced density states near gives rise steep interband absorption edge. change also yields dependence Fermi...
Abstract The melting temperature ( T m ) of iron at megabar pressures constrains the Earth's core structure and dynamics. Previous experimental studies demonstrated large discrepancies in high pressures. We used intrinsic resistance discontinuity across solid‐liquid transition as a criterion to study behavior laser‐heated diamond anvil cells. jump is sensitive incipient melting, capable detecting emergence less than 2 vol.% melts. found curve 30–135 GPa, but relatively low‐transition...
Mixed-halide perovskites have attracted extensive interest with their broadly tunable bandgap and optoelectronic properties, which makes them ideal candidates for various solar cells light-emitting diodes. However, the mixed-halide often encounter phase separation degradation under light illumination, prevents from many applications. The study on underlying mechanism controlling of is crucial to improve tailored properties practical Here, we report our systematical investigations...
The implementation of a laser pump/X-ray probe scheme for performing picosecond-resolution X-ray diffraction at the 1W2B wiggler beamline Beijing Synchrotron Radiation Facility is reported. With hybrid fill pattern in top-up mode, pixel array detector was optimized to gate out signal from singlet bunch with interval 85 ns train. pulse intensity ∼2.5 × 10(6) photons pulse(-1) 10 keV. synchronized this 1 kHz repetition rate. A polycapillary lens used secondary focusing obtain 72 µm (FWHM)...
Abstract Incorporation of water into mantle compositions can have significant effects on the phase relations in systems. In this study, we synthesized an iron‐rich hexagonal hydrous (referred to as “HH1‐phase”) under high pressure‐temperature ( P ‐ T ) conditions deep lower and determined crystal structure HH1‐phase at 79 GPa using multigrain crystallography method. The chemical formula obtained was Fe 12.76 O 18 H x ∼ 4.5) Fe‐O‐H system. To demonstrate role for storage multicomponent...
Received 15 October 2014DOI:https://doi.org/10.1103/PhysRevLett.113.179902© 2014 American Physical Society