Pressure-induced superconductivity in topological parent compound Bi2Te3

被引：306

作者：

Zhang, J. L. ^{[1
,2
,3
]}

Zhang, S. J. ^{[1
,2
]}

Weng, H. M. ^{[1
,2
]}

Zhang, W. ^{[1
,2
]}

Yang, L. X. ^{[1
,2
]}

Liu, Q. Q. ^{[1
,2
]}

Feng, S. M. ^{[1
,2
]}

Wang, X. C. ^{[1
,2
]}

Yu, R. C. ^{[1
,2
]}

Cao, L. Z. ^{[3
]}

Wang, L. ^{[4
]}

Yang, W. G. ^{[4
]}

Liu, H. Z. ^{[5
]}

Zhao, W. Y. ^{[6
]}

Zhang, S. C. ^{[7
,8
]}

Dai, X. ^{[1
,2
]}

Fang, Z. ^{[1
,2
]}

Jin, C. Q. ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China

[2] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China

[3] Univ Sci & Technol China, Dept Phys, Hefei 230026, Peoples R China

[4] Carnegie Inst Sci, Adv Photon Source, Geophys Lab, HPsync, Argonne, IL 60439 USA

[5] Harbin Inst Technol, Nat Sci Res Ctr, Harbin 150080, Peoples R China

[6] Wuhan Univ Technol, State Key Lab Adv Technol Mat Synth & Proc, Wuhan 430070, Peoples R China

[7] Stanford Univ, Dept Phys, Stanford, CA 94305 USA

[8] Tsinghua Univ, Ctr Adv Study, Beijing 100084, Peoples R China

来源：

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA | 2011年 / 108卷 / 01期

关键词：

high-pressure effects; pressure-tuned conductivity; topological superconductors; SINGLE DIRAC CONE; INSULATOR; SPIN;

D O I：

10.1073/pnas.1014085108

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

We report a successful observation of pressure-induced superconductivity in a topological compound Bi2Te3 with T-c of similar to 3 K between 3 to 6 GPa. The combined high-pressure structure investigations with synchrotron radiation indicated that the superconductivity occurred at the ambient phase without crystal structure phase transition. The Hall effects measurements indicated the hole-type carrier in the pressure-induced superconducting Bi2Te3 single crystal. Consequently, the first-principles calculations based on the structural data obtained by the Rietveld refinement of X-ray diffraction patterns at high pressure showed that the electronic structure under 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 Dirac-type surface states. We also discuss the possibility that the bulk state could be a topological superconductor.

引用

页码：24 / 28

页数：5

共 35 条

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