Superconductivity in CuxBi2Se3 and its implications for pairing in the undoped topological insulator

Y. S. Hor; A. J. Williams; J. G. Checkelsky; P. Roushan; J. Seo; Q. Xu; H. W. Zandbergen; A. Yazdani; N. P. Ong; R. J. Cava

doi:10.1103/PhysRevLett.104.057001

Superconductivity in CuxBi2Se3 and its implications for pairing in the undoped topological insulator

Y. S. Hor, A. J. Williams, J. G. Checkelsky, P. Roushan, J. Seo, Q. Xu, H. W. Zandbergen, A. Yazdani, N. P. Ong, R. J. Cava

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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 ∼2×1020cm-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.

Original language	English (US)
Article number	057001
Journal	Physical review letters
Volume	104
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevLett.104.057001
State	Published - Feb 1 2010

All Science Journal Classification (ASJC) codes

General Physics and Astronomy

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10.1103/PhysRevLett.104.057001

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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 ∼2×1020cm-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.",

author = "Hor, {Y. S.} and Williams, {A. J.} and Checkelsky, {J. G.} and P. Roushan and J. Seo and Q. Xu and Zandbergen, {H. W.} and A. Yazdani and Ong, {N. P.} and Cava, {R. J.}",

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AU - Williams, A. J.

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AU - Roushan, P.

AU - Seo, J.

AU - Xu, Q.

AU - Zandbergen, H. W.

AU - Yazdani, A.

AU - Ong, N. P.

AU - Cava, R. J.

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AB - 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 ∼2×1020cm-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.

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Superconductivity in CuxBi2Se3 and its implications for pairing in the undoped topological insulator

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