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.
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页数：4
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