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Browsing by Author "Lou, Dong-Sheng"

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    On the direct insulator-quantum Hall transition in two-dimensional electron systems in the vicinity of nanoscaled scatterers
    (2011)
    Liang, Chi-Te
    ;
    Lin, Li-Hung
    ;
    Chen, Kuang Yao
    ;
    Lo, Shun-Tsung
    ;
    Wang, Yi-Ting
    A direct insulator-quantum Hall (I-QH) transition corresponds to a crossover/transition from the insulating regime to a high Landau level filling factor nu > 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.