Real-space mapping of a disordered two-dimensional electron system in the quantum Hall regime

K. Hashimoto, J. Wiebe, T. Inaoka, Y. Hirayama, R. Wiesendanger, M. Morgenstern

Research output: Contribution to journalConference article

1 Citation (Scopus)

Abstract

By using scanning tunnelling spectroscopy, we study the influence of potential disorder on an adsorbate-induced two-dimensional electron system in the integer quantum Hall regime. The real-space imaged local density of states exhibits transition from localized drift states encircling the potential minima to another type of localized drift states encircling the potential maxima. While the former states show regular round shapes, the latter have irregular-shaped patterns. This difference is induced by different sources for the potential minima and maxima, i.e., substrate donors and an inhomogeneous distribution of the adsorbates, respectively.

Original languageEnglish
Article number012008
JournalJournal of Physics: Conference Series
Volume334
Issue number1
DOIs
Publication statusPublished - 2011 Jan 1
Event19th International Conference on the Application of High Magnetic Fields in Semiconductor Physics and Nanotechnology, HMF-19 - Fukuoka, Japan
Duration: 2010 Aug 12010 Aug 6

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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