Probing the onset of strong localization and electron–electron interactions with the presence of a direct insulator–quantum Hall transition
✍ Scribed by Shun-Tsung Lo; Kuang Yao Chen; T.L. Lin; Li-Hung Lin; Dong-Sheng Luo; Y. Ochiai; N. Aoki; Yi-Ting Wang; Zai Fong Peng; Yiping Lin; J.C. Chen; Sheng-Di Lin; C.F. Huang; C.-T. Liang
- Publisher
- Elsevier Science
- Year
- 2010
- Tongue
- English
- Weight
- 663 KB
- Volume
- 150
- Category
- Article
- ISSN
- 0038-1098
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✦ Synopsis
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.