Bulk quantum Hall effect: Evidence that surface states play a key role

被引：33

作者：

Hill, S ^{[1
]}

Sandhu, PS ^{[1
]}

Qualls, JS ^{[1
]}

Brooks, JS ^{[1
]}

Tokumoto, M ^{[1
]}

Kinoshita, N ^{[1
]}

Kinoshita, T ^{[1
]}

Tanaka, Y ^{[1
]}

机构：

[1] ELECTROTECH LAB, TSUKUBA, IBARAKI 305, JAPAN

来源：

PHYSICAL REVIEW B | 1997年 / 55卷 / 08期

关键词：

D O I：

10.1103/PhysRevB.55.R4891

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

It has been suggested recently that the alpha-(BEDT-TTF)(2)MHg(SCN)(4) salts (M=K and Tl) exhibit a bulk quantum Hall effect at high fields [Harrison et at, Phys. Rev; Lett. 77, 1576 (1996)]. We have examined experimentally predictions concerning the transport of current under such conditions. We find that the high field Shubnikov-de Haas oscillations exhibit a complicated temperature dependence, which is not evident in de Haas-van Alphen measurements on the same samples. These differences may be explained in terms of the competition between transport via the bulk and via the surface of the sample.

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页码：R4891 / R4894

页数：4

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