Superconductivity in the Doped Topological Insulator CuxBi2Se3 under High Pressure

被引：112

作者：

Bay, T. V. ^{[1
]}

Naka, T. ^{[2
]}

Huang, Y. K. ^{[1
]}

Luigjes, H. ^{[1
]}

Golden, M. S. ^{[1
]}

de Visser, A. ^{[1
]}

机构：

[1] Univ Amsterdam, Van der Waals Zeeman Inst, NL-1098 XH Amsterdam, Netherlands

[2] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan

来源：

PHYSICAL REVIEW LETTERS | 2012年 / 108卷 / 05期

关键词：

UPPER CRITICAL-FIELD; SURFACE; LIMIT;

D O I：

10.1103/PhysRevLett.108.057001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report a high-pressure single crystal study of the topological superconductor CuxBi2Se3. Resistivity measurements under pressure show superconductivity is depressed smoothly. At the same time the metallic behavior is gradually lost. The upper-critical field data B-c2(T) under pressure collapse onto a universal curve. The absence of Pauli limiting and the comparison of B-c2(T) to a polar-state function point to spin-triplet superconductivity, but an anisotropic spin-singlet state cannot be discarded completely.

引用

页数：4

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