Superconductivity in CuₓBi₂Se₃ and its Implications for Pairing in the Undoped Topological Insulator

Author

Yew San Hor, Missouri University of Science and TechnologyFollow
Anthony J. Williams
Joseph G. Checkelsky
Pedram Roushan
Jungpil Seo
Qiang Xu
Henny W. Zandbergen
Ali M. Yazdani
Naiphuan Ong
Robert Joseph Cava

Abstract

Bi₂Se₃ is one of a handful of known topological insulators. Here we show that copper intercalation in the van der Waals gaps between the Bi₂Se₃ layers, yielding an electron concentration of ~2x 10²⁰cm^-3, results in superconductivity at 3.8 K in Cu_xBi₂Se₃ for 0.12≤x≤0.15. This demonstrates that Cooper pairing is possible in Bi₂Se₃ at accessible temperatures, with implications for studying the physics of topological insulators and potential devices.

Recommended Citation

Y. S. Hor and A. J. Williams and J. G. Checkelsky and P. Roushan and J. Seo and Q. Xu and H. W. Zandbergen and A. M. Yazdani and N. Ong and R. J. Cava, "Superconductivity in CuₓBi₂Se₃ and its Implications for Pairing in the Undoped Topological Insulator," Physical Review Letters, vol. 104, no. 5, American Physical Society (APS), Feb 2010.

The definitive version is available at https://doi.org/10.1103/PhysRevLett.104.057001

Department(s)

Physics

Keywords and Phrases

Cooper Pairing; Copper Intercalation; Electron Concentration; Van Der Waals; Automobile Exhibitions; Superconductivity; Van Der Waals Forces; Topology

International Standard Serial Number (ISSN)

0031-9007

Document Type

Article - Journal

Document Version

Final Version

File Type

text

Language(s)

English

Rights

© 2010 American Physical Society (APS), All rights reserved.

Publication Date

01 Feb 2010