Microwave resonances in low-filling insulating phase of two-dimensional electron system

L. W. Engel, C. C. Li, D. Shahar, D. C. Tsui, M. Shayegan

Research output: Contribution to journalArticlepeer-review

42 Scopus citations


We present data on finite frequency (0.2 ≤ f ≤ 8.6 GHz) conductivity, Re(σxx), of the insulator terminating a fractional quantum Hall effect series in the high magnetic field (B) limit. As B is increased within the insulator, at temperatures of 50 and 200 mK Re(σxx) vs f evolves from a decreasing curve into a peak. The height and f of the peak increase with B. Integrals of Re(σxx) vs f become B-independent at large enough B. The results are discussed within the framework of the Fukuyama-Lee model of the dynamics of a pinned Wigner crystal.

Original languageEnglish (US)
Pages (from-to)167-171
Number of pages5
JournalSolid State Communications
Issue number3
StatePublished - Oct 1997

All Science Journal Classification (ASJC) codes

  • General Chemistry
  • Condensed Matter Physics
  • Materials Chemistry


  • A. Heterojunctions
  • D. Fractional quantum Hall effect
  • D. Quantum localization


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