Universal superconductivity phase diagram for pressurized tetradymite topological insulators

Shu Cai, S. K. Kushwaha, Jing Guo, Vladimir A. Sidorov, Congcong Le, Yazhou Zhou, Honghong Wang, Gongchang Lin, Xiaodong Li, Yanchuan Li, Ke Yang, Aiguo Li, Qi Wu, Jiangping Hu, Robert Joseph Cava, Liling Sun

Research output: Contribution to journalArticle

Abstract

We show that two different superconducting phases exist at high pressures in the optimized tetradymite topological insulators Bi2Te2Se (BTS) and Bi1.1Sb0.9Te2S (BSTS). The superconducting phases emerge at structural phase transitions; the first at ∼8.4GPa for BTS and ∼12.4GPa 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 allows 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.

Original languageEnglish (US)
Article number114203
JournalPhysical Review Materials
Volume2
Issue number11
DOIs
StatePublished - Nov 13 2018

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superconductivity
phase diagrams
insulators
electronic structure
crystal structure

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Physics and Astronomy (miscellaneous)

Cite this

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 Joseph ; Sun, Liling. / Universal superconductivity phase diagram for pressurized tetradymite topological insulators. In: Physical Review Materials. 2018 ; Vol. 2, No. 11.
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abstract = "We show that two different superconducting phases exist at high pressures in the optimized tetradymite topological insulators Bi2Te2Se (BTS) and Bi1.1Sb0.9Te2S (BSTS). The superconducting phases emerge at structural phase transitions; the first at ∼8.4GPa for BTS and ∼12.4GPa 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 allows 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.",
author = "Shu Cai and Kushwaha, {S. K.} and Jing Guo and Sidorov, {Vladimir A.} and Congcong Le and Yazhou Zhou and Honghong Wang and Gongchang Lin and Xiaodong Li and Yanchuan Li and Ke Yang and Aiguo Li and Qi Wu and Jiangping Hu and Cava, {Robert Joseph} and Liling Sun",
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Cai, S, Kushwaha, SK, Guo, J, Sidorov, VA, Le, C, Zhou, Y, Wang, H, Lin, G, Li, X, Li, Y, Yang, K, Li, A, Wu, Q, Hu, J, Cava, RJ & Sun, L 2018, 'Universal superconductivity phase diagram for pressurized tetradymite topological insulators', Physical Review Materials, vol. 2, no. 11, 114203. https://doi.org/10.1103/PhysRevMaterials.2.114203

Universal superconductivity phase diagram for pressurized tetradymite topological insulators. / 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 Joseph; Sun, Liling.

In: Physical Review Materials, Vol. 2, No. 11, 114203, 13.11.2018.

Research output: Contribution to journalArticle

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T1 - Universal superconductivity phase diagram for pressurized tetradymite topological insulators

AU - Cai, Shu

AU - Kushwaha, S. K.

AU - Guo, Jing

AU - Sidorov, Vladimir A.

AU - Le, Congcong

AU - Zhou, Yazhou

AU - Wang, Honghong

AU - Lin, Gongchang

AU - Li, Xiaodong

AU - Li, Yanchuan

AU - Yang, Ke

AU - Li, Aiguo

AU - Wu, Qi

AU - Hu, Jiangping

AU - Cava, Robert Joseph

AU - Sun, Liling

PY - 2018/11/13

Y1 - 2018/11/13

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AB - We show that two different superconducting phases exist at high pressures in the optimized tetradymite topological insulators Bi2Te2Se (BTS) and Bi1.1Sb0.9Te2S (BSTS). The superconducting phases emerge at structural phase transitions; the first at ∼8.4GPa for BTS and ∼12.4GPa 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 allows 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.

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