Pressure-induced superconductivity in B i2-x S bx T e3-y S ey

Tong He, Xiaofan Yang, Tomoya Taguchi, Teppei Ueno, Kaya Kobayashi, Jun Akimitsu, Hitoshi Yamaoka, Hirofumi Ishii, Yen Fa Liao, Hiromi Ota, Hidenori Goto, Ritsuko Eguchi, Kensei Terashima, Takayoshi Yokoya, Harald Olaf Jeschke, Xianxin Wu, Yoshihiro Kubozono

Research output: Contribution to journalArticle

Abstract

We systematically investigated the pressure dependence of electrical transport and the crystal structure of topological insulator, Bi2-xSbxTe3-ySey, which showed no superconductivity down to 2.0 K at ambient pressure. The Bi2-xSbxTe3-ySey crystal showed two structural phase transitions under pressure, from rhombohedral structure (space group No. 166, R3m, termed phase I) to monoclinic structure (space group No. 12, C2/m, termed phase II), and from phase II to another monoclinic structure (space group No. 12, C2/m, termed phase III). Superconductivity appeared when applying pressure; actually the superconductivity of all Bi2-xSbxTe3-ySey samples emerged in phase I. The superconducting transition temperature, Tc, increased against pressure in a pressure range of 0-15 GPa for all Bi2-xSbxTe3-ySey samples, and the maximum Tc was 5.45 K, recorded at 13.5 GPa in Bi2-xSbxTe3-ySey at x=0 and y=1.0. The magnetic field (H) dependence of the R-T plot for Bi2-xSbxTe3-ySey was measured to characterize the superconducting pairing mechanism of pressure-induced superconducting phase.

Original languageEnglish
Article number094525
JournalPhysical Review B
Volume100
Issue number9
DOIs
Publication statusPublished - Sep 19 2019

Fingerprint

Tellurium compounds
Antimony compounds
Bismuth compounds
antimony compounds
tellurium compounds
bismuth compounds
Superconductivity
Superconducting transition temperature
superconductivity
Crystal structure
crystal structure
pressure dependence
plots
transition temperature
insulators
Phase transitions
Magnetic fields
Crystals

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Pressure-induced superconductivity in B i2-x S bx T e3-y S ey. / He, Tong; Yang, Xiaofan; Taguchi, Tomoya; Ueno, Teppei; Kobayashi, Kaya; Akimitsu, Jun; Yamaoka, Hitoshi; Ishii, Hirofumi; Liao, Yen Fa; Ota, Hiromi; Goto, Hidenori; Eguchi, Ritsuko; Terashima, Kensei; Yokoya, Takayoshi; Jeschke, Harald Olaf; Wu, Xianxin; Kubozono, Yoshihiro.

In: Physical Review B, Vol. 100, No. 9, 094525, 19.09.2019.

Research output: Contribution to journalArticle

He, Tong ; Yang, Xiaofan ; Taguchi, Tomoya ; Ueno, Teppei ; Kobayashi, Kaya ; Akimitsu, Jun ; Yamaoka, Hitoshi ; Ishii, Hirofumi ; Liao, Yen Fa ; Ota, Hiromi ; Goto, Hidenori ; Eguchi, Ritsuko ; Terashima, Kensei ; Yokoya, Takayoshi ; Jeschke, Harald Olaf ; Wu, Xianxin ; Kubozono, Yoshihiro. / Pressure-induced superconductivity in B i2-x S bx T e3-y S ey. In: Physical Review B. 2019 ; Vol. 100, No. 9.
@article{b028076b5ced4c3e9ecf6560f7d1d1ec,
title = "Pressure-induced superconductivity in B i2-x S bx T e3-y S ey",
abstract = "We systematically investigated the pressure dependence of electrical transport and the crystal structure of topological insulator, Bi2-xSbxTe3-ySey, which showed no superconductivity down to 2.0 K at ambient pressure. The Bi2-xSbxTe3-ySey crystal showed two structural phase transitions under pressure, from rhombohedral structure (space group No. 166, R3m, termed phase I) to monoclinic structure (space group No. 12, C2/m, termed phase II), and from phase II to another monoclinic structure (space group No. 12, C2/m, termed phase III). Superconductivity appeared when applying pressure; actually the superconductivity of all Bi2-xSbxTe3-ySey samples emerged in phase I. The superconducting transition temperature, Tc, increased against pressure in a pressure range of 0-15 GPa for all Bi2-xSbxTe3-ySey samples, and the maximum Tc was 5.45 K, recorded at 13.5 GPa in Bi2-xSbxTe3-ySey at x=0 and y=1.0. The magnetic field (H) dependence of the R-T plot for Bi2-xSbxTe3-ySey was measured to characterize the superconducting pairing mechanism of pressure-induced superconducting phase.",
author = "Tong He and Xiaofan Yang and Tomoya Taguchi and Teppei Ueno and Kaya Kobayashi and Jun Akimitsu and Hitoshi Yamaoka and Hirofumi Ishii and Liao, {Yen Fa} and Hiromi Ota and Hidenori Goto and Ritsuko Eguchi and Kensei Terashima and Takayoshi Yokoya and Jeschke, {Harald Olaf} and Xianxin Wu and Yoshihiro Kubozono",
year = "2019",
month = "9",
day = "19",
doi = "10.1103/PhysRevB.100.094525",
language = "English",
volume = "100",
journal = "Physical Review B",
issn = "2469-9950",
publisher = "American Physical Society",
number = "9",

}

TY - JOUR

T1 - Pressure-induced superconductivity in B i2-x S bx T e3-y S ey

AU - He, Tong

AU - Yang, Xiaofan

AU - Taguchi, Tomoya

AU - Ueno, Teppei

AU - Kobayashi, Kaya

AU - Akimitsu, Jun

AU - Yamaoka, Hitoshi

AU - Ishii, Hirofumi

AU - Liao, Yen Fa

AU - Ota, Hiromi

AU - Goto, Hidenori

AU - Eguchi, Ritsuko

AU - Terashima, Kensei

AU - Yokoya, Takayoshi

AU - Jeschke, Harald Olaf

AU - Wu, Xianxin

AU - Kubozono, Yoshihiro

PY - 2019/9/19

Y1 - 2019/9/19

N2 - We systematically investigated the pressure dependence of electrical transport and the crystal structure of topological insulator, Bi2-xSbxTe3-ySey, which showed no superconductivity down to 2.0 K at ambient pressure. The Bi2-xSbxTe3-ySey crystal showed two structural phase transitions under pressure, from rhombohedral structure (space group No. 166, R3m, termed phase I) to monoclinic structure (space group No. 12, C2/m, termed phase II), and from phase II to another monoclinic structure (space group No. 12, C2/m, termed phase III). Superconductivity appeared when applying pressure; actually the superconductivity of all Bi2-xSbxTe3-ySey samples emerged in phase I. The superconducting transition temperature, Tc, increased against pressure in a pressure range of 0-15 GPa for all Bi2-xSbxTe3-ySey samples, and the maximum Tc was 5.45 K, recorded at 13.5 GPa in Bi2-xSbxTe3-ySey at x=0 and y=1.0. The magnetic field (H) dependence of the R-T plot for Bi2-xSbxTe3-ySey was measured to characterize the superconducting pairing mechanism of pressure-induced superconducting phase.

AB - We systematically investigated the pressure dependence of electrical transport and the crystal structure of topological insulator, Bi2-xSbxTe3-ySey, which showed no superconductivity down to 2.0 K at ambient pressure. The Bi2-xSbxTe3-ySey crystal showed two structural phase transitions under pressure, from rhombohedral structure (space group No. 166, R3m, termed phase I) to monoclinic structure (space group No. 12, C2/m, termed phase II), and from phase II to another monoclinic structure (space group No. 12, C2/m, termed phase III). Superconductivity appeared when applying pressure; actually the superconductivity of all Bi2-xSbxTe3-ySey samples emerged in phase I. The superconducting transition temperature, Tc, increased against pressure in a pressure range of 0-15 GPa for all Bi2-xSbxTe3-ySey samples, and the maximum Tc was 5.45 K, recorded at 13.5 GPa in Bi2-xSbxTe3-ySey at x=0 and y=1.0. The magnetic field (H) dependence of the R-T plot for Bi2-xSbxTe3-ySey was measured to characterize the superconducting pairing mechanism of pressure-induced superconducting phase.

UR - http://www.scopus.com/inward/record.url?scp=85072763184&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85072763184&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.100.094525

DO - 10.1103/PhysRevB.100.094525

M3 - Article

AN - SCOPUS:85072763184

VL - 100

JO - Physical Review B

JF - Physical Review B

SN - 2469-9950

IS - 9

M1 - 094525

ER -