A5089804524- Topological Materials and Phenomena
- High-pressure geophysics and materials
- Iron-based superconductors research
- Advanced Condensed Matter Physics
- Graphene research and applications
- Rare-earth and actinide compounds
- 2D Materials and Applications
- Electronic and Structural Properties of Oxides
- Magnetic and transport properties of perovskites and related materials
- Physics of Superconductivity and Magnetism
- Quantum, superfluid, helium dynamics
- Diamond and Carbon-based Materials Research
- Advanced Thermoelectric Materials and Devices
- Hydrogen Storage and Materials
- Boron and Carbon Nanomaterials Research
- Quantum and electron transport phenomena
- Advanced Chemical Physics Studies
- Superconductivity in MgB2 and Alloys
- Theoretical and Computational Physics
- Chalcogenide Semiconductor Thin Films
- Photonic Crystals and Applications
- MXene and MAX Phase Materials
- Nanowire Synthesis and Applications
- High Entropy Alloys Studies
- Energetic Materials and Combustion
ShanghaiTech University
2022-2025
Institute of Applied Physics and Computational Mathematics
2020-2022
Collaborative Innovation Center of Advanced Microstructures
2016-2020
Nanjing University
2016-2020
Significance Three-dimensional (3D) Dirac semimetals have attracted a lot of advanced research recently on many exotic properties and their association with crystalline electronic structures under extreme conditions. As one the fundamental state parameters, high pressure is an effective, clean way to tune lattice as well states, especially in quantum thus magnetic properties. In this paper, by combining multiple experimental probes (synchrotron X-ray diffraction, low-temperature transport...
The structure and superconductivity of $\mathrm{WT}{\mathrm{e}}_{2}$ under pressure are investigated using ab initio calculations combined with high-pressure synchrotron x-ray diffraction Raman spectroscopy. We find that the emergence in can be attributed to phase transition from ambient ${T}_{d}$ monoclinic $1T$\ensuremath{'} at around 4--5 GPa, which is associated a sliding layers, resulting critical point changes Te-Te interlayer distance. This introduces an inversion center eliminates...
Nickelate superconductors have attracted a great deal of attention over the past few decades due to their similar crystal and electronic structures with high-temperature cuprate superconductors. Here, we report superconductivity in pressurized Ruddlesden-Popper phase single <a:math xmlns:a="http://www.w3.org/1998/Math/MathML"...
Strain can be used as an effective tool to tune the crystal structure of materials and hence modify their electronic structures, including topological properties. Here, taking ${\mathrm{Na}}_{3}\mathrm{Bi}$ a paradigmatic example, we demonstrated with first-principles calculations $\mathbf{k}\ifmmode\cdot\else\textperiodcentered\fi{}\mathbf{p}$ models that phase transitions induced by various types strains. For instance, Dirac semimetal ambient tuned into insulator (TI) uniaxial strain along...
${\mathrm{Lu}}_{5}{\mathrm{Rh}}_{6}{\mathrm{Sn}}_{18}$ is one of the cage-type superconductors with superconducting transition temperature ${T}_{c}=4.12$ K. Here we investigate effect pressure on superconductivity in by combining high-pressure electrical transport, synchrotron x-ray diffraction (XRD), and chemical doping. Application high can enhance both metallicity ${\mathrm{Lu}}_{5}{\mathrm{Rh}}_{6}{\mathrm{Sn}}_{18}$. ${T}_{c}$ found to show a continuous increase reaching up 5.50 K at...
The magnetic van der Waals crystals ${(\mathrm{Mn}\phantom{\rule{0.16em}{0ex}}{X}_{2}{\mathrm{Te}}_{4})}_{m}{({X}_{2}{\mathrm{Te}}_{3})}_{n}$ $(X=\mathrm{Sb},\phantom{\rule{0.28em}{0ex}}\mathrm{Bi})$ have drawn significant attention due to their rich topological properties and tenability by external field. In this letter, we report on the discovery of superconductivity in insulator candidate ${\mathrm{MnSb}}_{4}{\mathrm{Te}}_{7}$ ($m=1$, $n=1$) via application high pressure....
Nickelate superconductors have attracted a great deal of attention over the past few decades due to their similar crystal and electronic structures with high-temperature cuprate superconductors. Here, we report superconductivity in pressurized Ruddlesden-Popper phase single crystal, La4Ni3O10 (n = 3), its interplay density wave order diagram. With increasing pressure, as indicated by anomaly resistivity is progressively suppressed, followed emergence around 25 K. Our angle-resolved...
Abstract Topological transition metal dichalcogenides (TMDCs) have attracted much attention due to their potential applications in spintronics and quantum computations. In this work, the structural electronic properties of topological TMDCs candidate ZrTe 2 are systematically investigated under high pressure. A pressure‐induced Lifshitz is evidenced by change charge carrier type as well Fermi surface. Superconductivity observed at around 8.3 GPa without phase transition. typical dome‐shape...
The research on hydrogen-rich ternary compounds attract tremendous attention for it paves new route to room-temperature superconductivity at lower pressures. Here, we study the crystal structures, electronic and superconducting properties of Ca-U-H system, combining structure predictions with
Abstract Layered SnAs‐based Zintl compounds exhibit a distinctive electronic structure, igniting extensive research efforts in areas of superconductivity, topological insulators, and quantum magnetism. In this paper, the crystal structures properties compound SrSn 2 As upon compression are systematically investigated. Pressure‐induced superconductivity is observed with nonmonotonic evolution superconducting transition temperature T c . Theoretical calculations together high‐pressure...
Using a machine-learning accelerated crystal structural search, and ab initio calculations together with high-pressure Raman measurements, we study the electronic structures of bismuth iodide (BiI) systematically up to 50 GPa. We find that ambient $C2/m$ phase ($\ensuremath{\beta}\ensuremath{-}\mathrm{B}{\mathrm{i}}_{4}{\mathrm{I}}_{4}$) transforms across tetragonal $P{4}_{2}/mmc$ at 8.5 GPa finally hexagonal $P{6}_{3}/mmc$ 28.2 Our experiments identify transition around 8.6 GPa,...
Magnetic topological insulators, possessing both magnetic order and electronic structure, provides an excellent platform to research unusual physical properties. Here, we report a high-pressure study on the anomalous Hall effect of TI MnSb4Te7 through transports measurements combined with first-principle theoretical calculations. We discover that ground state experiences phase transition from A-type antiferromagnetic ferromagnetic dominating at 3.78 GPa, although its crystal sustains...
As an empirical tool in materials science and engineering, the iconic phase diagram owes its robustness practicality to topological characteristics rooted celebrated Gibbs law (F = C - P + 2). When crossing boundary, structure transition occurs abruptly, bringing about instantaneous change physical properties limited controllability on boundaries 1). Here, we expand sharp boundary amorphous region 2) by partially disrupting long-range translational symmetry, leading a sequential...
Recently the discovery of superconductivity with a critical temperature Tc up to 80 K in Ruddlesden-Popper phases Lan+1NinO3n+1 (n = 2) under pressure has garnered considerable attention. Up now, was only observed La3Ni2O7 single crystal grown optical-image floating zone furnace oxygen pressure. It remains be understood effect chemical doping on superconducting as well other phases. Here, we systematically investigate external and polycrystalline Our results demonstrate application...
The Zintl compound $A{\mathrm{In}}_{2}{X}_{2}$ $(A=\mathrm{Ca}, \mathrm{Sr}, \text{and} X=\mathrm{P}, \mathrm{As})$, as a theoretically predicted nonmagnetic topological insulator, requires experiments to understand its electronic structure and characteristics. In this paper, we systematically investigate the crystal structures properties of $\mathrm{Sr}{\mathrm{In}}_{2}{\mathrm{As}}_{2}$ under both ambient high-pressure conditions. By means angle-resolved photoemission spectroscopy, observe...
We present in situ high-pressure synchrotron x-ray diffraction (XRD) and electrical transport measurements on quasi-one-dimensional single-crystal $\mathrm{Ti}{\mathrm{S}}_{3}$ up to 29.9--39.0 GPa diamond-anvil cells, coupled with first-principles calculations. Counterintuitively, the conductive behavior of semiconductor becomes increasingly insulating pressure until ${P}_{C1}\ensuremath{\sim}12\phantom{\rule{0.16em}{0ex}}\mathrm{GPa}$, where extremes all three axial ratios are observed....
$\mathrm{A}{\mathrm{u}}_{2}\mathrm{Pb}$ is a candidate of natural topological superconductors that has attracted much attention in the last few years. Combining ab initio calculations with machine-learning accelerated crystal structure searches, we have found two ground states $\mathrm{A}{\mathrm{u}}_{2}\mathrm{Pb}$: $Pca{2}_{1}$ phase at ambient pressure and $I\overline{4}2d$ high pressure. The energetically more favorable than known Pbcn can be for x-ray diffraction refinement; our suggest...
Tellurium (Te) is one of the $p$-orbital chalcogens, which shows attractive physical properties at ambient pressure. Here, we systematically investigate both structural and electronic evolution Te single crystal under high pressure up to 40 GPa. The dependence experimental Raman spectrum reveals occurrence multiple phase transitions, consistent with high-pressure synchrotron x-ray diffraction measurements. appearance superconductivity in accompanied by transitions. phases reveal a...
Recently, giant intrinsic anomalous Hall effect (AHE) has been observed in the materials with kagome lattice. Here, we systematically investigate influence of high pressure on AHE ferromagnet LiMn 6 Sn clean Mn Our situ high-pressure Raman spectroscopy indicates that crystal structure maintains a hexagonal phase under pressures up to 8.51 GPa. The conductivity (AHC) <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mrow> <mml:msubsup> <mml:mi>σ</mml:mi>...
Binary metal sulfides are a potential family of materials for exploring high <a:math xmlns:a="http://www.w3.org/1998/Math/MathML"><a:msub><a:mi>T</a:mi><a:mi mathvariant="normal">c</a:mi></a:msub></a:math> superconductors under pressure. In this work, we study the crystal structures, electronic and superconducting properties Lu-S system in pressure range from 0 to 200 GPa, combining structure predictions with calculations. We predict 15 unique encompassing seven unidentified stoichiometries....