From insulator to quantum Hall liquid at low magnetic fields

被引：16

作者：

Huang, Tsai-Yu ^{[1
]}

Liang, C. -T. ^{[1
]}

Kim, Gil-Ho ^{[2
,3
]}

Huang, C. F. ^{[4
]}

Huang, Chao-Ping ^{[1
]}

Lin, Jyun-Ying ^{[1
]}

Goan, Hsi-Sheng ^{[1
,5
]}

Ritchie, D. A. ^{[6
]}

机构：

[1] Natl Taiwan Univ, Dept Phys, Taipei 106, Taiwan

[2] Sungkyunkwan Univ, Sch Informat & Commun Engn, Suwon 440746, South Korea

[3] Sungkyunkwan Univ, SAINT, Suwon 440746, South Korea

[4] Ind Technol Res Inst, Natl Measurement Lab, Ctr Measurement Stand, Hsinchu 300, Taiwan

[5] Natl Taiwan Univ, Ctr Theoret Sci, Taipei 106, Taiwan

[6] Univ Cambridge, Cavendish Lab, Cambridge CB3 OHE, England

来源：

PHYSICAL REVIEW B | 2008年 / 78卷 / 11期

基金：

英国工程与自然科学研究理事会;

关键词：

D O I：

10.1103/PhysRevB.78.113305

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have performed low-temperature transport measurements on a GaAs two-dimensional electron system at low magnetic fields. Multiple temperature-independent points and accompanying oscillations are observed in the longitudinal resistivity between the low-field insulator and the quantum Hall (QH) liquid. Our results support the existence of an intermediate regime, where the amplitudes of magneto-oscillations can be well described by conventional Shubnikov-de Haas theory, between the low-field insulator and QH liquid.

引用

页数：4

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