A5100395760- High-pressure geophysics and materials
- Rare-earth and actinide compounds
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Boron and Carbon Nanomaterials Research
- Metal and Thin Film Mechanics
- Advanced Frequency and Time Standards
- Hydrogen Storage and Materials
- Crystallography and molecular interactions
- Hydrocarbon exploration and reservoir analysis
- Iron-based superconductors research
- Nuclear Materials and Properties
- Advanced Chemical Physics Studies
- GNSS positioning and interference
- Superconductivity in MgB2 and Alloys
- Crystal Structures and Properties
- Inorganic Chemistry and Materials
- MXene and MAX Phase Materials
- Geophysics and Gravity Measurements
- Advanced Fiber Laser Technologies
- Atomic and Subatomic Physics Research
- Inorganic Fluorides and Related Compounds
- Ionosphere and magnetosphere dynamics
- Particle Detector Development and Performance
- GaN-based semiconductor devices and materials
Jilin Medical University
2018-2025
Jilin University
2015-2025
V. Bakul Institute for Superhard Materials
2018-2025
Shandong University of Science and Technology
2025
State Key Laboratory of Superhard Materials
2009-2024
Xi'an University of Architecture and Technology
2023-2024
Tokyo Metropolitan University
2024
Yanshan University
2023-2024
Wuhan University
2023
North China Electric Power University
2023
We report a novel phase of carbon possessing monoclinic C2/m structure (8 atoms/cell) identified using an ab initio evolutionary structural search. This polymorph, which we call M-carbon, is related to the (2x1) reconstruction (111) surface diamond and can also be viewed as distorted (through sliding buckling sheets) form graphite. It stable over cold-compressed graphite above 13.4 GPa. The simulated x-ray diffraction pattern near K-edge spectroscopy are in satisfactory agreement with...
The recent discovery of superconductive rare earth and actinide superhydrides has ushered in a new era superconductivity research at high pressures. This distinct type clathrate metal hydrides was first proposed for alkaline-earth-metal hydride CaH_{6} that, however, long eluded experimental synthesis, impeding an understanding pertinent physics. Here, we report successful synthesis its measured superconducting critical temperature T_{c} 215 K 172 GPa, which is evidenced by sharp drop...
The search for high-temperature superconducting superhydrides has recently moved into a new phase by going beyond extensively probed binary compounds and focusing on ternary ones with vastly expanded material types configurations property optimization. Theoretical experimental works have revealed promising that superconduct at or above room temperature, but it remains pressing challenge to synthesize stoichiometric well-resolved crystal structure can host superconductivity submegabar...
A sharp focus of current research on superconducting superhydrides is to raise their critical temperature Tc at moderate pressures. Here, we report a discovery giant enhancement in CeH9 obtained via random substitution half Ce by La, leading equal-atomic (La,Ce)H9 alloy stabilized maximum configurational entropy, containing the LaH9 unit that unstable pure compound form. The synthesized exhibits 148-178 K pressure range 97-172 GPa, representing up 80% compared and showcasing highest...
Hydrides are promising candidates for achieving room-temperature superconductivity, but a formidable challenge remains in reducing the stabilization pressure below megabar. In this study, we successfully synthesized ternary lanthanum borohydride by introducing nonmetallic element B into La–H system, forming robust B–H covalent bonds that lower required to stabilize superconducting phase. Electrical transport measurements confirm presence of superconductivity with critical temperature (Tc) up...
On the basis of evolutionary methodology for crystal structure prediction, we have clarified long-standing debates on ground state structures technically important molybdenum borides: MoB2, Mo2B5, and MoB4. The earlier proposed rhombohedral Mo2B5 WB4-type MoB4 are ruled out. Instead, two novel hexagonal P63/mmc proposed. Moreover, yet synthesized MoB3 was found to adopt intriguing R3̅m suggested be experimentally synthesizable by calculation convex hull. Density states revealed that strong...
The flourishing rare earth superhydrides are a class of recently discovered materials that possess near-room-temperature superconductivity at high pressures, opening new era research pressures. Among these superhydrides, yttrium attracted great interest owing to their abundance stoichiometries and excellent superconductivities. Here, we carried out comprehensive study in wide pressure range 145-300 GPa. We successfully synthesized series with the compositions YH4, YH6, YH7, YH9, reported...
In recent years, more and metal oxides have been finding critical tribo-catalytic applications. Presently, we explored the conversion of H<sub>2</sub>O CO<sub>2</sub> using Co<sub>3</sub>O<sub>4</sub> nanoparticles obtained some surprising results. an as-received 150 mL glass reactor enclosed with 10 H<sub>2</sub>O, 0.10 g nanoparticles, 1 atm CO<sub>2</sub>, a Teflon magnetic rotary disk, observed production as much 57.41 µmol/L H<sub>2</sub>, 0.15 CH<sub>4</sub>, 0.21 CO after 5 h...
Various nitrogen species in nitrides are fascinating since they often appear with these nitride as superconductors, hard materials, and high-energy density. As a typical complex, though iron has been intensively studied, the iron-nitrogen (Fe-N) compounds only have confined to single atom (N) or molecule (N
An unprecedented hydride Ca 2 H with an antifluorite-type structure is predicted to possess the coexistence of electride states and superconductivity under pressure. This study paves way for search novel superconductor hydrides.
Abstract The chemistry of hypercoordination has been a subject fundamental interest, especially for understanding structures that challenge conventional wisdom. small ionic radii Fe ions typically result in coordination numbers 4 or 6 stable Fe‐bearing compounds. While 8‐coordinated observed highly compressed oxides, the pursuit hypercoordinated still faces significant challenges due to complexity synthesizing anticipated compound with another suitable anion. Through first‐principles...
In certain scenarios, such as detection of unexploded ordnance (UXO), submarines, and intruders, magnetic anomaly (MAD) is an effective method due to the field advantages small operating power, strong penetrability, anti-interference ability. However, variability in background geomagnetic low signal-to-noise ratio (SNR) MAD cannot be avoided. this article, we propose a employing improved orthogonal basis function (OBF) for tensor contraction decomposition. The decomposition approach makes...
Based on field outcrop investigation, interpretation and analysis of drilling seismic data, consulting a large number previous research results, the characteristics ancient marine hydrocarbon source rocks, favorable reservoir facies belts, migration direction reservoir-forming law in Ordos Basin have been studied from viewpoints North China Craton breakup Qilian-Qinling oceanic basin opening closing. Four main results are obtained: (1) Controlled by deep-water shelf-rift, there three suites...
We have extensively explored the high-pressure structures of transition-metal diborides (TMB(2), TM = Sc, Ti, Y, and Zr) stabilized with AlB(2)-type structure at ambient pressure by using first-principles structural prediction. find two novel structures: (i) a monoclinic (C2/m, Z 4) for ScB(2) YB(2) stable above 208 163 GPa, respectively; (ii) tetragonal alpha-ThSi(2)-type phase (I4(1)/amd, TiB(2) 215 GPa. Our calculations show that electron transfer from transition-metals to B under might...
Materials once suffered at high-pressure and high-temperature (HPHT) conditions often exhibit exotic phenomena that defy conventional wisdom. The behaviors of sulfur dioxide (SO_{2}), one the archetypal simple molecules, HPHT have attracted a great deal attention due to its relevance S cycle between deep Earth atmosphere. Here we report discovery an unexpected disproportionation SO_{2} via bond breaking into elemental trioxide (SO_{3}) through jointly experimental theoretical study. Measured...
The deformation characteristics and strength failure mechanisms of rock materials have consistently represented critical research challenges in engineering. To elucidate the elastoplastic damage fracture behavior under loading conditions, this study proposes an ordinary state-based peridynamics model incorporating Drucker-Prager yield criterion. establishes a peridynamic constitutive formulation through integration theory with Furthermore, accounts for influence plastic on bond during phase,...
Abstract Muon scattering tomography is a non-destructive technique used to image different materials by utilizing natural cosmic ray muons. Typically it requires position-sensitive detectors with sub-millimeter resolution effectively distinguish high-Z in compact system. The plastic scintillating fiber detector feasible candidate and currently being designed one-dimensional silicon photomultiplier (SiPM) readout. In this work, we constructed experimental setups characterize three SiPMs from...
In recent years, the discovery of unconventional polyhydrides under high pressure, including notable instances like CaH6, YH9, and LaH10, with superconducting critical temperature (Tc) above 200 K, has ignited considerable interest in quest for high-temperature superconductivity hydrogen-based materials. Recent studies have suggested highly probable existence hydrogen vacancies these high-Tc hydrides, although there is no conclusive evidence. this study, taking niobium (Nb) hydride as a...