TY - JOUR
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 J.
AU - Sun, Liling
N1 - Publisher Copyright:
© 2018 American Physical Society.
PY - 2018/11/13
Y1 - 2018/11/13
N2 - 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.
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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U2 - 10.1103/PhysRevMaterials.2.114203
DO - 10.1103/PhysRevMaterials.2.114203
M3 - Article
AN - SCOPUS:85060660625
SN - 2475-9953
VL - 2
JO - Physical Review Materials
JF - Physical Review Materials
IS - 11
M1 - 114203
ER -