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Title: Universal superconductivity phase diagram for pressurized tetradymite topological insulators

Abstract

Two different superconducting phases exist at high pressures in the optimized tetradymite topological insulators Bi2Te2Se (BTS) and Bi1.1Sb0.9Te2S (BSTS) are demonstrated in this work. The superconducting phases emerge at structural phase transitions; the first at ~ 8.4 GPa for BTS and ~ 12.4 GPa for BSTS, and the second at 13.6 GPa for BTS and 20.4 GPa, for BSTS. Electronic structure calculations show that these phases do not have topological character. Comparison of our results with prior work on Bi2Se3, Bi2Te3, and (Bi, Sb)2(Se,Te)3 enable us to uncover a universal phase diagram for pressure-induced superconductivity in tetradymites, providing a basis for understanding the relationships between topological behavior, crystal structure, and superconductivity for these materials.

Authors:
 [1]; ORCiD logo [2];  [1];  [3];  [1];  [1];  [1];  [1];  [1];  [1];  [4];  [4];  [1];  [1];  [5];  [6]
  1. Chinese Academy of Sciences (CAS), Beijing (China)
  2. Princeton Univ., NJ (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  3. Russian Academy of Sciences, Moscow (Russia)
  4. Chinese Academy of Sciences (CAS), Shanghai (China)
  5. Princeton Univ., NJ (United States)
  6. Chinese Academy of Sciences (CAS), Beijing (China); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE Office of Science (SC). Basic Energy Sciences (BES) (SC-22); USDOE National Nuclear Security Administration (NNSA); National Key Research and Development Program of China; National Natural Science Foundation of China (NSFC)
OSTI Identifier:
1544747
Report Number(s):
LA-UR-19-26036
Journal ID: ISSN 2475-9953; PRMHAR
Grant/Contract Number:  
89233218CNA000001
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Materials
Additional Journal Information:
Journal Volume: 2; Journal Issue: 11; Journal ID: ISSN 2475-9953
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; topological insulator; superconductivity; high pressure

Citation Formats

Cai, Shu, Kushwaha, S. K., Guo, Jing, Sidorov, Vladimir A., Le, Congcong, Zhou, Yazhou, Wang, Honghong, Lin, Gongchang, Li, Xiaodong, Li, Yanchuan, Yang, Ke, Li, Aiguo, Wu, Qi, Hu, Jiangping, Cava, Robert J., and Sun, Liling. Universal superconductivity phase diagram for pressurized tetradymite topological insulators. United States: N. p., 2018. Web. doi:10.1103/PhysRevMaterials.2.114203.
Cai, Shu, Kushwaha, S. K., Guo, Jing, Sidorov, Vladimir A., Le, Congcong, Zhou, Yazhou, Wang, Honghong, Lin, Gongchang, Li, Xiaodong, Li, Yanchuan, Yang, Ke, Li, Aiguo, Wu, Qi, Hu, Jiangping, Cava, Robert J., & Sun, Liling. Universal superconductivity phase diagram for pressurized tetradymite topological insulators. United States. https://doi.org/10.1103/PhysRevMaterials.2.114203
Cai, Shu, Kushwaha, S. K., Guo, Jing, Sidorov, Vladimir A., Le, Congcong, Zhou, Yazhou, Wang, Honghong, Lin, Gongchang, Li, Xiaodong, Li, Yanchuan, Yang, Ke, Li, Aiguo, Wu, Qi, Hu, Jiangping, Cava, Robert J., and Sun, Liling. Tue . "Universal superconductivity phase diagram for pressurized tetradymite topological insulators". United States. https://doi.org/10.1103/PhysRevMaterials.2.114203. https://www.osti.gov/servlets/purl/1544747.
@article{osti_1544747,
title = {Universal superconductivity phase diagram for pressurized tetradymite topological insulators},
author = {Cai, Shu and Kushwaha, S. K. and Guo, Jing and Sidorov, Vladimir A. and Le, Congcong and Zhou, Yazhou and Wang, Honghong and Lin, Gongchang and Li, Xiaodong and Li, Yanchuan and Yang, Ke and Li, Aiguo and Wu, Qi and Hu, Jiangping and Cava, Robert J. and Sun, Liling},
abstractNote = {Two different superconducting phases exist at high pressures in the optimized tetradymite topological insulators Bi2Te2Se (BTS) and Bi1.1Sb0.9Te2S (BSTS) are demonstrated in this work. The superconducting phases emerge at structural phase transitions; the first at ~ 8.4 GPa for BTS and ~ 12.4 GPa for BSTS, and the second at 13.6 GPa for BTS and 20.4 GPa, for BSTS. Electronic structure calculations show that these phases do not have topological character. Comparison of our results with prior work on Bi2Se3, Bi2Te3, and (Bi, Sb)2(Se,Te)3 enable us to uncover a universal phase diagram for pressure-induced superconductivity in tetradymites, providing a basis for understanding the relationships between topological behavior, crystal structure, and superconductivity for these materials.},
doi = {10.1103/PhysRevMaterials.2.114203},
journal = {Physical Review Materials},
number = 11,
volume = 2,
place = {United States},
year = {Tue Nov 13 00:00:00 EST 2018},
month = {Tue Nov 13 00:00:00 EST 2018}
}

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