Single-edge transport in an InAs/GaSb quantum spin Hall insulator

被引：35

作者：

Couedo, Francois ^{[1
]}

Irie, Hiroshi ^{[1
]}

Suzuki, Kyoichi ^{[1
]}

Onomitsu, Koji ^{[1
]}

Muraki, Koji ^{[1
]}

机构：

[1] NTT Corp, NTT Basic Res Labs, 3-1 Morinosato Wakamiya, Atsugi, Kanagawa 2430198, Japan

来源：

PHYSICAL REVIEW B | 2016年 / 94卷 / 03期

关键词：

TOPOLOGICAL INSULATORS; SUPERCONDUCTIVITY; TRANSITION; WELLS; STATE;

D O I：

10.1103/PhysRevB.94.035301

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report transport measurements in a single edge channel of an InAs/GaSb quantum spin Hall insulator, where the conduction occurs through only one pair of counterpropagating edge modes. By using a specific sample design involving highly asymmetric current paths, we electrically isolate a single edge channel of the two-dimensional topological insulator from the other edge. This enables us to probe a single edge by multiterminal measurements. Both two-terminal and four-terminal resistances show a nearly quantized plateau around h/e(2) for a 4-mu m-long edge, indicating quasiballistic transport. Our approach is advantageous in that it allows us to gain insight into a microscopic region from local measurements.

引用

页数：5

共 47 条

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