Superconductivity of topological matters induced via pressure

doi:10.1007/s11467-011-0217-9

Front. Phys.

2012, Vol. 7

Issue (2) : 193-199 https://doi.org/10.1007/s11467-011-0217-9

REVIEW ARTICLE

Superconductivity of topological matters induced via pressure

Jun-liang Zhang^1,2, Si-jia Zhang¹, Hong-ming Weng¹, Wei Zhang¹, Liu-xiang Yang¹, Qing-qing Liu¹, Pan-pan Kong¹, Jie Zhu¹, Shao-min Feng¹, Xian-cheng Wang¹, Ri-cheng Yu¹, Lie-zhao Cao², Shoucheng Zhang³, Xi Dai¹, Zhong Fang¹, Chang-qing Jin¹(

)

1. Beijing National Laboratory for Condensed Matter Physics & Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China; 2. Department of Physics, University of Science & Technology of China, Hefei 230026, China; 3. Department of Physics, McCullough Building, Stanford University, Stanford, CA 94305-4045, USA & Center for Advanced Study, Tsinghua University, Beijing 100084, China

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Abstract

By applying pressure on the topological insulator Bi₂Te₃ single crystal, superconducting phase was found without a crystal structure phase transition. The new superconducting phase is under the pressure range of 3 GPa to 6 GPa. The high pressure Hall effect measurements indicated that the superconductivity caused by bulk hole pockets. The high pressure structure investigations with synchrotron X-ray diffraction indicated that the superconducting phase is of similar structure to that of ambient phase structure with only slight change with lattice parameter and internal atomic position. The topological band structures indicate the superconducting phase under high pressure remained topologically nontrivial. The results suggested that topological superconductivity can be realized in Bi₂Te₃ due to the proximity effect between superconducting bulk states and Diractype surface states. We also discussed the possibility that the bulk state could be a topological superconductor.

Keywords topological insulator high pressure

Corresponding Author(s): Jin Chang-qing,Email:Jin@iphy.ac.cn

Issue Date: 01 April 2012

Cite this article:

Hong-ming Weng,Wei Zhang,Liu-xiang Yang, et al. Superconductivity of topological matters induced via pressure[J]. Front. Phys. , 2012, 7(2): 193-199.

URL:

https://academic.hep.com.cn/fop/EN/10.1007/s11467-011-0217-9
https://academic.hep.com.cn/fop/EN/Y2012/V7/I2/193

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