A5102925352- High-pressure geophysics and materials
- Geological and Geochemical Analysis
- earthquake and tectonic studies
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Crystal Structures and Properties
- Pigment Synthesis and Properties
- Mineralogy and Gemology Studies
- Force Microscopy Techniques and Applications
- Iron-based superconductors research
- Magnetic Properties and Synthesis of Ferrites
- Organic Electronics and Photovoltaics
- Conducting polymers and applications
- Perovskite Materials and Applications
- Glass properties and applications
- Advanced Condensed Matter Physics
- Electrical and Thermal Properties of Materials
- Catalysis and Oxidation Reactions
- Material Dynamics and Properties
- 2D Materials and Applications
- Microwave Dielectric Ceramics Synthesis
- Topological Materials and Phenomena
- Thermal and Kinetic Analysis
- Organic and Molecular Conductors Research
- Thermal Expansion and Ionic Conductivity
University of Hawaiʻi at Mānoa
2017-2024
Institute of Geochemistry
2016-2024
Chinese Academy of Sciences
2016-2024
Changzhou University
2021
National Center for Nanoscience and Technology
2020-2021
Czech Academy of Sciences, Institute of Geophysics
2021
University of Hawaii System
2021
Argonne National Laboratory
2021
University of Chicago
2021
University of Chinese Academy of Sciences
2017-2018
Abstract High pressure is an effective tool to induce exotic quantum phenomena in magnetic topological insulators by controlling the interplay of order and state. This work presents a comprehensive high-pressure study crystal structure ground state up 62 GPa intrinsic magnet EuSn 2 P . With combination high resolution X-ray diffraction, 151 Eu synchrotron Mössbauer spectroscopy, absorption molecular orbital calculations, electronic band it has been revealed that drives from rhombohedral...
Abstract Synchrotron‐based high‐pressure and temperature single‐crystal X‐ray diffraction experiments were conducted on two hydrous orthoenstatite samples (oEn#1: Mg 1.004 Si 0.996 O 3 , ~619 ppm water; oEn#2: 0.947 Ni 0.055 0.998 ~696 water) to ~34 GPa 700 K, using resistively heated diamond anvil cells. The α ‐opx ( Pbca space group)→ β P 2 1 / c group) phase transition of oEn#1 occurs at 12.90(2) GPa, the persists 34.25(1) GPa. ‐ oEn#2 13.50(1) a new isosymmetric ‐opx→ ‐opxII takes place...
(Ca, Mg)-rich clinopyroxenes are abundant in Earth's upper mantle and subduction zones. Experimental studies on the thermoelastic properties of these minerals at simultaneous high pressure temperature important for constraining composition structure Earth. Here, we present a synchrotron-based single-crystal X-ray diffraction study natural diopside-dominated augite [(Ca0.89Na0.05Mg0.06)(Mg0.74Fe0.11Al0.14Ti0.01)(Si1.88Al0.12) O6.00] P T to ~27 GPa 700 K. The experiment simulates conditions...
Abstract Understanding changes in material properties through external stimuli plays a key role validating the expected performance of materials and engineering controlled manner. Here, we introduce fundamental protocol to deduce dehydration reactions kinetics water confined nanopore channels, with cyclosilicate beryl as scaffold interest, using time-resolved synchrotron X-ray diffraction (SXRD), temperature interval 298–1038 K. The temperature-dependent intensity $$(I)$$ <mml:math...
We report the crystallographic and electrical transport properties of single crystals ferromagnetic two-dimensional (2D) material ${\mathrm{Cr}}_{2}{\mathrm{Ge}}_{2}{\mathrm{Te}}_{6}$ under high pressure. In contrast to previous studies, our high-pressure single-crystal x-ray diffraction hydrostatic conditions shows prominent anisotropic compressibility in layered structure crystalline $R\overline{3}$ phase without any structural transitions up 20 GPa. Our data confirm a distinct...
We report pressure-induced superconductivity in a ternary and nonmagnetic Cu-containing semiconductor, Cu2Br2Se6, with wide band gap of 1.89 eV, which the Cu Br atoms generate infinite 21 helical chains along c-axis are linked by cyclohexane-like Se6 rings to form three-dimensional framework. find that this framework is remarkably robust under compression, ambient-pressure phase survives at least our experimental limit 32.1 GPa. Concurrent semiconductor-to-metal transition observed above...
The equation of state and stability topaz at high-pressure/high-temperature conditions have been investigated by in situ synchrotron X-ray diffraction (XRD) Raman spectroscopy this study. No phase transition occurs on over the experimental pressure–temperature (P-T) range. pressure–volume data were fitted third-order Birch–Murnaghan (EoS) with zero-pressure unit–cell volume V0 = 343.86 (9) Å3, bulk modulus K0 172 (3) GPa, its pressure derivative K’0 1.3 (4), while obtained 155 (2) GPa when...
The high-pressure and high-temperature behaviors of manganotantalite Mn(Ta,Nb)2O6 have been investigated by single-crystal X-ray diffraction Raman spectroscopy combined with diamond anvil cell technique, as well first-principle calculations. A pressure-induced reversible phase transition occurs at 9.5 GPa room temperature, accompanied a large volume collapse (∼7.0%) drastic color change from brownish-yellow to red. space groups low-pressure (LP) (HP) phases are the same (Pbcn), but...
Abstract. Tibet, which is characterized by collisional orogens, has undergone the process of delamination or convective removal. The lower crust and mantle lithosphere appear to have been removed through during orogenic development. Numerical analog experiments demonstrate that metamorphic eclogitized oceanic subduction slab may promote gravitational instability due increased density. crustal root believed be denser than underlying tends sink. However, density eclogite under high-pressure...
Two wide-bandgap copolymer donors with reduced synthesis cost offered decent PCEs up to 15.25% in organic solar cells.
Abstract Pressure-induced polymorphic phase transitions are important in fundamental physics, chemistry, materials science, and geoscience. The isosymmetric transition is unique that it retains crystal symmetry through the exhibits both first- second-order characteristics. However, underlying mechanisms of have not been well constrained under high pressures. Here, we report a novel case pressure-induced cerite, rare earth element (REE) mineral, using diamond anvil cell combined with in-situ...
Using our recently developed force constants approach, we have determined the equilibrium Si isotope fractionation between omphacite/garnet, quartz/kyanite, and quartz/zircon at temperatures relevant to petrogenesis. We find that Na strongly affects omphacite garnet. Our results suggested garnet in eclogite collected Dabie Mountain, as well kyanite its host quartz veins, are isotopically equilibrium, which further suggests Mountain eclogites veins underwent same high pressure-temperature...
Crystal-chemical properties of synthetic Almandine-Pyrope (Alm-Pyr) solid solutions were investigated by X-ray single-crystal diffraction and Raman spectroscopy. Garnet solution with different compositions synthesized from powder at 4.0 GPa annealed 1200 °C for 48 h a multi-anvil pressure apparatus. crystals sizes (about 60–1000 μm) obtained synthesis. The results show that the unit cell constants decrease increasing Pyr contents in Alm-Pyr due to smaller ionic radius Mg2+ eightfold...
Seismic tomography studies have revealed a high-velocity anomaly at depths between 100 km and 300 in the Farallon plate. However, reasons for continue to be debated. An analysis of mineral proportions eclogites exhumed from plate shows that average amount zoisite eclogite is ∼16.0 vol%. Therefore, presence needs considered explain thermal equation state stability not been fully investigated under high pressure−temperature (P-T) conditions. We high-pressure high-temperature behavior natural...
The past few decades have witnessed mechanochemistry emerging at the forefront of solid-state chemical synthesis, driven by search new and cleaner synthetic methodologies.Mechanochemical synthesis utilizes high energy impact phenomenon to initiate reactions.The peak pressures, which individual sample particles experience, vary depending on type mill, milling speed, as well size, shape, density components, but can often exceed 10 GPa, while temperature remains below 100 o C. Evolving beyond...