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

被引：932

作者：

Hor, Y. S. ^{[1
]}

Williams, A. J. ^{[1
]}

Checkelsky, J. G. ^{[2
]}

Roushan, P. ^{[2
]}

Seo, J. ^{[2
]}

Xu, Q. ^{[3
]}

Zandbergen, H. W. ^{[3
]}

Yazdani, A. ^{[2
]}

Ong, N. P. ^{[2
]}

Cava, R. J. ^{[1
]}

机构：

[1] Princeton Univ, Dept Chem, Princeton, NJ 08544 USA

[2] Princeton Univ, Dept Phys, Princeton, NJ 08544 USA

[3] Delft Inst Technol, Dept Nanosci, Natl Ctr HREM, NL-2628 CJ Delft, Netherlands

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 104卷 / 05期

基金：

美国国家科学基金会;

关键词：

QUANTUM SPIN HALL; SINGLE DIRAC CONE; PHASE-TRANSITION; BI2SE3; PHYSICS; BI2TE3; STATE;

D O I：

10.1103/PhysRevLett.104.057001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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 similar to 2 x 10(20) cm(-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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页数：4

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