Metal insulator transition in modulated quantum Hall systems

M. Koshino, T. Ando

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


The quantum Hall effect is studied numerically in modulated two-dimensional electron systems in the presence of disorder. Based on the scaling property of the Hall conductivity as well as the localization length, the critical energies where the states are extended are identified. We find that the critical energies, which are distributed to each of the subbands, combine into one when the disorder becomes strong, in the way depending on the symmetry of the disorder and/or the periodic potential.

Original languageEnglish
Pages (from-to)588-592
Number of pages5
JournalPhysica E: Low-Dimensional Systems and Nanostructures
Issue number3-4
Publication statusPublished - 2005 Nov
Externally publishedYes


  • Anderson localization
  • Quantum Hall effect
  • The Hofstadter butterfly

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics


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