A5040786120- Topological Materials and Phenomena
- Iron-based superconductors research
- Advanced Condensed Matter Physics
- Rare-earth and actinide compounds
- 2D Materials and Applications
- Physics of Superconductivity and Magnetism
- Graphene research and applications
- Magnetic and transport properties of perovskites and related materials
- Molecular Spectroscopy and Structure
- Quantum, superfluid, helium dynamics
- ZnO doping and properties
- Advanced Chemical Physics Studies
- Advanced Battery Materials and Technologies
- Advancements in Battery Materials
- Cold Atom Physics and Bose-Einstein Condensates
- Electronic and Structural Properties of Oxides
- Chemical Thermodynamics and Molecular Structure
- Transition Metal Oxide Nanomaterials
- Superconductivity in MgB2 and Alloys
- Porphyrin and Phthalocyanine Chemistry
- Chemical Reactions and Mechanisms
- Intellectual Capital and Performance Analysis
- Inorganic Chemistry and Materials
- Quantum and electron transport phenomena
- Magnetism in coordination complexes
Zhejiang University
2016-2025
Hangzhou Normal University
2021-2025
National Institute for Materials Science
2022-2023
The University of Tokyo
2021
Westlake University
2021
Shanghai Jiao Tong University
2020
The spin dynamics and electronic orders of the kagome system at different filling levels stand as an intriguing subject in condensed matter physics. By first-principles calculations random phase approximation analyses, we investigate fluctuations superconducting instabilities CsCr3Sb5 under high pressure. At level slightly below flat bands, our reveal strong antiferromagnetic CsCr3Sb5, together with a leading s±-wave competing (dxy, $${d}_{{x}^{2}-{y}^{2}}$$ )-wave order. Unlike general...
Using polarized optical and magneto-optical spectroscopy, we have demonstrated universal aspects of electrodynamics associated with Dirac nodal lines that are found in several classes unconventional intermetallic compounds. We investigated anisotropic [Formula: see text] where the spin-orbit coupling (SOC) triggers energy gaps along lines. These manifest as sharp steps conductivity spectra This behavior is followed by linear power-law scaling at higher frequencies, consistent our theoretical...
The electronic structures and topological properties of transition metal dipnictides $XPn_2$ ($X$=Ta, Nb; $Pn$=P, As, Sb) have been systematically studied using first-principles calculations. In addition to small bulk Fermi surfaces, the band anticrossing features near level can be identified from without spin-orbit coupling, leading nodal lines in all these compounds. Inclusion coupling gaps out leaving only a pair disentangled electron/hole bands crossing level. Therefore, low energy...
We investigate the electronic structure of nickelate superconductor ${\mathrm{NdNiO}}_{2}$ upon hole doping, by means density-functional theory and dynamical mean-field theory. demonstrate strong intrinsic hybridization between strongly correlated states formed Ni-$3{d}_{{x}^{2}\ensuremath{-}{y}^{2}}$ orbital itinerant electrons due to Nd-$5d$ Ni-$3{d}_{{z}^{2}}$ orbitals, producing a valence-fluctuating metal as normal state hole-doped ${\mathrm{NdNiO}}_{2}$. The Hund's rule appears play...
The unique electronic and crystal structures driven by external pressure in transition metal chalcogenides (TMCs) can host emergent quantum states. Here we report pressure-induced metallization, nontrivial ${Z}_{2}$ band topology, superconductivity TMC ${\mathrm{Ta}}_{2}{\mathrm{Ni}}_{3}{\mathrm{Te}}_{5}$. Our electrical transport measurements show that the metallization emerges at 3.3 GPa, followed appearance of ${P}_{\mathrm{c}}=21.3\phantom{\rule{0.28em}{0ex}}\mathrm{GPa}$ with...
The CsCr3Sb5 exhibits superconductivity in close proximity to a density-wave (DW) like ground state at ambient pressure1, however details of the DW is still elusive. Using first-principles density-functional calculations, we found its be 4 × 2 altermagnetic spin-density-wave (SDW) pressure, with an averaged effective moment ~ 1.7μB/Cr. magnetic long range order coupled lattice, generating 4a0 structural modulation. Multiple competing SDW phases are present and energetically close, suggesting...
Abstract Superconductivity in crystals without inversion symmetry has received extensive attention due to its unconventional pairing and possible nontrivial topological properties. Using first-principles calculations, we systemically study the electronic structure of noncentrosymmetric superconductors A 2 Cr 3 As (A = Na, K, Rb, Cs). Topologically protected triply degenerate points connected by one-dimensional arcs appear along C axis, coexisting with strong ferromagnetic (FM) fluctuations...
The cathode performance is critical for developing a magnesium rechargeable battery, and spinel oxides MgM2O4 (M = Mn/Fe/Co) show promise. However, (de)magnesiation oxidative electrolyte decomposition are major issues. In this study, we investigated the microscopic mechanisms of dimethoxyethane (DME) on using density functional theory calculations. study shows that demagnesiation promotes decomposition, DME most likely to decompose MgMn2O4 during charging compared MgFe2O4 MgCo2O4. Density...
Abstract The relationship between magnetism and superconductivity has been one of the most discussed topics in iron-based superconductors. Using first-principles calculations, we have studied electronic structure 1144-type superconductor EuRbFe 4 As . We find crystal field splitting is unique, such that $$d_{z^2}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msub> <mml:mrow> <mml:mi>d</mml:mi> </mml:mrow> <mml:msup> <mml:mi>z</mml:mi> <mml:mn>2</mml:mn> </mml:msup>...
Coexistence of topological bands and a charge density wave (CDW) in materials has attracted immense attention because their fantastic properties, such as an axionic CDW, the three-dimensional quantum Hall effect, etc. In this work, nodal-line semimetal ${\mathrm{In}}_{x}{\mathrm{TaS}}_{2}$ characterized by CDW superconductivity is successfully synthesized, whose structure (two separated Weyl rings) are similar to ${\mathrm{In}}_{0.58}{\mathrm{TaSe}}_{2}$. A...
Topological crystalline metals/semimetals (TCMs) have stimulated a great research interest, which broaden the classification of topological phases and provide valuable platform to explore superconductivity. Here, we report discovery superconductivity features in Pb-intercalated transition-metal dichalcogenide Pb$_{1/3}$TaS$_2$. Systematic measurements indicate that Pb$_{1/3}$TaS$_2$ is quasi-two-dimensional (q-2D) type-II superconductor ({\em T}$_c \approx$ 2.8 K) with significantly enhanced...
Owing to its unique geometry, the kagome lattice hosts various many-body quantum states including frustrated magnetism, superconductivity, and charge-density waves (CDWs), with intense efforts focused on metals exhibiting $2\times2$ CDWs associated nesting of van Hove saddle points. Recently, a $\sqrt{3}\times\sqrt{3}$ CDW was discovered in metal ScV$_6$Sn$_6$ below $T_{\rm CDW}\approx91$~K, whose underlying mechanism formation process remain unclear. Using inelastic X-ray scattering, we...
The interrelationship between flat bands and correlated phenomena such as unconventional superconductivity stands an intriguing subject in condensed matter physics. Here, by first-principles calculations random phase approximation analyses, we investigate the electronic structure, superconducting instability, well roles of incipient kagome superconductor CsCr$_3$Sb$_5$. Our reveal strong antiferromagnetic spin fluctuations CsCr$_3$Sb$_5$, which mediates two sets spin-singlet orders with...
In transition-metal dipnictides TmPn2 (Tm = Ta and Nb; Pn P, As, Sb), the origin of extremely large magnetoresistance (XMR) is yet to be studied by direct visualization experimental band structures. Here, using angle-resolved photoemission spectroscopy, we map out three-dimensional electronic structure NbAs2. The open-orbit topology contributes a non-negligible part Fermi surfaces (FSs), like that isostructural compound MoAs2, where open FS proposed likely explain XMR. We further demonstrate...
We report a topological semimetal ${\mathrm{W}}_{2}{\mathrm{As}}_{3}$ with space group $C2/m$. Based on the first-principles calculations, band crossings are partially gapped when spin-orbit coupling is included. The ${Z}_{2}$ indices at electron filling [1;111], characterizing strong insulator and surface states. From magnetotransport measurements, nearly quadratic field dependence of magnetoresistance (MR) ($B\ensuremath{\parallel}[200]$) 3 K indicates an electron-hole compensated compound...
The electronic property and magnetic susceptibility of Ce$_3$Pd$_3$Bi$_4$ were systemically investigated from 18 K to 290 for varying values cell-volume using dynamic mean-field theory coupled with density functional theory. By extrapolating zero temperature, the ground state at ambient pressure is found be a correlated semimetal due insufficient hybridization. Upon applying pressure, hybridization strength increases crossover Kondo insulator observed finite temperatures. characteristic...
Abstract Owing to its unique geometry, the kagome lattice hosts various many-body quantum states including frustrated magnetism, superconductivity, charge-density waves (CDWs), and topologically nontrivial phases of matter. Kagome metals with 2×2 CDWs, corresponding nesting van Hove saddle points, are found exhibit a number exotic electronic phases, have been focus much recent research. More recently, √3×√3 CDW was discovered in metal ScV 6 Sn below T ≈91 K, whose underlying mechanism...