Quantum oscillations in a topological insulator Bi1-xSbx

被引：165

作者：

Taskin, A. A. ^{[1
]}

Ando, Yoichi ^{[1
]}

机构：

[1] Osaka Univ, Inst Sci & Ind Res, Osaka 5670047, Japan

来源：

PHYSICAL REVIEW B | 2009年 / 80卷 / 08期

关键词：

antimony alloys; bismuth alloys; electrical resistivity; Fermi surface; magnetisation; quantum interference phenomena; BISMUTH; PHASE; ELECTRONS; WELLS;

D O I：

10.1103/PhysRevB.80.085303

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have studied transport and magnetic properties of Bi1-xSbx, which is believed to be a topological insulator-a new state of matter where an insulating bulk supports an intrinsically metallic surface. In nominally insulating Bi0.91Sb0.09 crystals, we observed strong quantum oscillations of the magnetization and the resistivity originating from a Fermi surface which has a clear two-dimensional character. In addition, a three-dimensional Fermi surface is found to coexist, which is possibly due to an unusual coupling of the bulk to the surface. This finding demonstrates that quantum oscillations can be a powerful tool to directly probe the novel electronic states in topological insulators.

引用

页数：6

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