Superconductivity in CuxBi2Se3 and its Implications for Pairing in the Undoped Topological Insulator
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 CuxBi2Se3 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.
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 http://dx.doi.org/10.1103/PhysRevLett.104.057001
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)
Article - Journal
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