On the direct insulator-quantum Hall transition in two-dimensional electron systems in the vicinity of nanoscaled scatterers |
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Authors: | Liang Chi-Te Lin Li-Hung Kuang Yoa Chen Lo Shun-Tsung Wang Yi-Ting Lou Dong-Sheng Kim Gil-Ho Yuan-Huei Chang Ochiai Yuichi Aoki Nobuyuki Chen Jeng-Chung Lin Yiping Chun-Feng Huang Lin Sheng-Di Ritchie David A |
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Affiliation: | Department of Physics, National Taiwan University, Taipei 106, Taiwan. ctliang@phys.ntu.edu.tw. |
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Abstract: | A direct insulator-quantum Hall (I-QH) transition corresponds to a crossover/transition from the insulating regime to a high Landau level filling factor ν > 2 QH state. Such a transition has been attracting a great deal of both experimental and theoretical interests. In this study, we present three different two-dimensional electron systems (2DESs) which are in the vicinity of nanoscaled scatterers. All these three devices exhibit a direct I-QH transition, and the transport properties under different nanaoscaled scatterers are discussed. |
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