Observation of magnetic-field-induced delocalization: Transition from Anderson insulator to quantum Hall conductor

H. W. Jiang, C. E. Johnson, K. L. Wang, S. T. Hannahs

Research output: Contribution to journalArticlepeer-review

186 Citations (Scopus)

Abstract

We report the first experimental observation of a magnetic-field-induced transition from an Anderson insulator to a quantum Hall conductor in a two-dimensional electron gas (2DEG) system. With sufficiently strong disorder, the 2DEG is an Anderson insulator with a divergent resistance at B=0. The 2DEG is transformed into a quantum Hall conductor with a vanishing resistance as T→0 and a quantized Hall resistance when the lowest Landau level is filled. The observations demonstrate the magnetic-field-induced delocalization and are consistent with a recently proposed global phase diagram.

Original languageEnglish
Pages (from-to)1439-1442
Number of pages4
JournalPhysical review letters
Volume71
Issue number9
DOIs
Publication statusPublished - 1993

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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