Nanoscale Research Letters (Jan 2011)

On the direct insulator-quantum Hall transition in two-dimensional electron systems in the vicinity of nanoscaled scatterers

  • Lin Sheng-Di,
  • Kim Gil-Ho,
  • Lou Dong-Sheng,
  • Chen Jeng-Chung,
  • Lin Yiping,
  • Ritchie David,
  • Lin Li-Hung,
  • Ochiai Yuichi,
  • Aoki Nobuyuki,
  • Liang Chi-Te,
  • Chen Kuang,
  • Lo Shun-Tsung,
  • Wang Yi-Ting,
  • Chang Yuan,
  • Huang Chun

Journal volume & issue
Vol. 6, no. 1
p. 131

Abstract

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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.