Probing the onset of strong localization and electron-electron interactions with the presence of a direct insulator-quantum Hall transition

被引：8

作者：

Lo, Shun-Tsung ^{[1
]}

Chen, Kuang Yao ^{[1
]}

Lin, T. L. ^{[1
]}

Lin, Li-Hung ^{[2
]}

Luo, Dong-Sheng ^{[3
]}

Ochiai, Y. ^{[4
]}

Aoki, N. ^{[4
]}

Wang, Yi-Ting ^{[1
]}

Peng, Zai Fong ^{[2
]}

Lin, Yiping ^{[3
]}

Chen, J. C. ^{[3
]}

Lin, Sheng-Di ^{[5
]}

Huang, C. F. ^{[6
]}

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

机构：

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

[2] Natl Chiayi Univ, Dept Appl Phys, Chiayi 600, Taiwan

[3] Natl Tsing Hua Univ, Dept Phys, Hsinchu 300, Taiwan

[4] Chiba Univ, Grad Sch Adv Integrat Sci, Inage Ku, Chiba 2638522, Japan

[5] Natl Chiao Tung Univ, Dept Elect Engn, Hsinchu 300, Taiwan

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

来源：

SOLID STATE COMMUNICATIONS | 2010年 / 150卷 / 39-40期

关键词：

Semiconductor; Epitaxy; Electron-electron interactions; Quantum Hall effect; FIELD-INDUCED DELOCALIZATION; LOW MAGNETIC-FIELDS; PHASE-DIAGRAM; LANDAU QUANTIZATION; DIMENSIONS; TRANSPORT; LIQUID; GAS; HETEROSTRUCTURES; CONDUCTIVITY;

D O I：

10.1016/j.ssc.2010.07.040

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We have performed low-temperature transport measurements on a disordered two-dimensional electron system (2DES). Features of the strong localization leading to the quantum Hall effect are observed after the 2DES undergoes a direct insulator-quantum Hall transition on increasing the perpendicular magnetic field. However, such a transition does not correspond to the onset of strong localization. The temperature dependences of the Hall resistivity and Hall conductivity reveal the importance of the electron-electron interaction effects for the observed transition in our study. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：1902 / 1905

页数：4

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