Topological superconductivity and large spin Hall effect in the kagome family Ti6X4 (X = Bi, Sb, Pb, Tl, and In)

Yi, Xin-Wei; Zheng-Wei, Liao,; You, Jing-Yang; Gu, Bo; Su, Gang

doi:10.1016/j.isci.2022.105813

Cited by 7 publications

(4 citation statements)

References 79 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Apparently, our calculated parameter λ is higher than some alloys (0.56 for PbVSe 2 at 6.4 GPa, 0.46 for SnVSe 2 and 0.64 for Ti 6 Pb 4 ) and slightly lower than some perovskites (1.43 for MgVH 6 at 150 GPa). 28,55,56 …”

Section: Resultsmentioning

confidence: 99%

Piezochromic effects and low-pressure superconductivity discovered in inorganic halide perovskite RbPbI₃

Zhou,

Tian,

Kuang

et al. 2024

J. Mater. Chem. C

View full text Add to dashboard Cite

show abstract

Section: Resultsmentioning

confidence: 99%

Piezochromic effects and low-pressure superconductivity discovered in inorganic halide perovskite RbPbI₃

Zhou,

Tian,

Kuang

et al. 2024

J. Mater. Chem. C

View full text Add to dashboard Cite

show abstract

“…Kagome-lattice compounds are known to exhibit unavoidable exotic topological electronic states [1][2][3][4][5][6][7]. The discovery of the charge density wave (CDW) in some of these compounds has introduced a captivating dimension to the research [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Tuning charge density wave of kagome metal ScV₆Sn₆

Yi,

Feng,

Kumar

et al. 2024

New J. Phys.

View full text Add to dashboard Cite

Compounds with a kagome lattice exhibit intriguing properties and the charge density wave (CDW) adds an additional layer of interest to research on them. In this study, we investigate the temperature and magnetic field dependent electrical properties under a chemical substitution and hydrostatic pressure of ScV6Sn6, a non-magnetic charge density wave (CDW) compound. Substituting 5 % Cr at the V site or applying 1.5 GPa of pressure shifts the CDW to 50 K from 92 K. This shift is attributed to the movement of the imaginary phonon band, as revealed by the phonon dispersion relation. The longitudinal and Hall resistivities respond differently under these stimuli. The magnetoresistance (MR) maintains its quasilinear behavior under pressure, but it becomes quadratic after Cr substitution. The anomalous Hall-like behavior of the parent compound persists up to the respective CDW transition under pressure, after which it sharply declines. In contrast, the nonlinear Hall resistivity of Cr substituted compounds follows a two-band model and originates from the multi carrier effect. These results clearly highlight the role of phonon contributions in the CDW transition and call for further investigation into the origin of the anomalous Hall-like behavior in the parent compound.

show abstract

“…Among them, ATi 3 Bi 5 (A=Rb, Cs) compounds with enhanced T c of about 4.8 K and electronic nematicity have recently been synthesized [ 50 – 53 ]. Another kagome superconductor family, similar to ATi 3 Bi 5 , has also been predicted and awaits experimental verification [ 54 ]. The nematic order in CsV 3 Sb 5 is considered as the vestige order of CDW [ 31 ].…”

Section: Introductionmentioning

confidence: 99%

Superconducting, Topological, and Transport Properties of Kagome Metals CsTi ₃ Bi ₅ and RbTi ₃ Bi ₅

Yi,

Liao,

You

et al. 2023

Research

Self Cite

View full text Add to dashboard Cite

The recently discovered ATi 3 Bi 5 (A=Cs, Rb) exhibit intriguing quantum phenomena including superconductivity, electronic nematicity, and abundant topological states. ATi 3 Bi 5 present promising platforms for studying kagome superconductivity, band topology, and charge orders in parallel with AV 3 Sb 5 . In this work, we comprehensively analyze various properties of ATi 3 Bi 5 covering superconductivity under pressure and doping, band topology under pressure, thermal conductivity, heat capacity, electrical resistance, and spin Hall conductivity (SHC) using first-principles calculations. Calculated superconducting transition temperature ( T c ) of CsTi 3 Bi 5 and RbTi 3 Bi 5 at ambient pressure are about 1.85 and 1.92 K. When subject to pressure, T c of CsTi 3 Bi 5 exhibits a special valley and dome shape, which arises from quasi-two-dimensional compression to three-dimensional isotropic compression within the context of an overall decreasing trend. Furthermore, T c of RbTi 3 Bi 5 can be effectively enhanced up to 3.09 K by tuning the kagome van Hove singularities (VHSs) and flat band through doping. Pressures can also induce abundant topological surface states at the Fermi energy ( E F ) and tune VHSs across E F . Additionally, our transport calculations are in excellent agreement with recent experiments, confirming the absence of charge density wave. Notably, SHC of CsTi 3 Bi 5 can reach up to 226 ℏ ·(e· Ω ·cm) –1 at E F . Our work provides a timely and detailed analysis of the rich physical properties for ATi 3 Bi 5 , offering valuable insights for further experimental verifications and investigations in this field.

show abstract

Topological superconductivity and large spin Hall effect in the kagome family Ti6X4 (X = Bi, Sb, Pb, Tl, and In)

Cited by 7 publications

References 79 publications

Piezochromic effects and low-pressure superconductivity discovered in inorganic halide perovskite RbPbI₃

Piezochromic effects and low-pressure superconductivity discovered in inorganic halide perovskite RbPbI₃

Tuning charge density wave of kagome metal ScV₆Sn₆

Superconducting, Topological, and Transport Properties of Kagome Metals CsTi ₃ Bi ₅ and RbTi ₃ Bi ₅

Contact Info

Product

Resources

About

Topological superconductivity and large spin Hall effect in the kagome family Ti6X4 (X = Bi, Sb, Pb, Tl, and In)

Cited by 7 publications

References 79 publications

Piezochromic effects and low-pressure superconductivity discovered in inorganic halide perovskite RbPbI3

Piezochromic effects and low-pressure superconductivity discovered in inorganic halide perovskite RbPbI3

Tuning charge density wave of kagome metal ScV6Sn6

Superconducting, Topological, and Transport Properties of Kagome Metals CsTi 3 Bi 5 and RbTi 3 Bi 5

Contact Info

Product

Resources

About

Piezochromic effects and low-pressure superconductivity discovered in inorganic halide perovskite RbPbI₃

Piezochromic effects and low-pressure superconductivity discovered in inorganic halide perovskite RbPbI₃

Tuning charge density wave of kagome metal ScV₆Sn₆

Superconducting, Topological, and Transport Properties of Kagome Metals CsTi ₃ Bi ₅ and RbTi ₃ Bi ₅