Even denominator filling factors in the thermoelectric power of a 2DEG

S. A J Wiegers, B. Tieke, U. Zeitler, R. Fletcher, A. K. Geim, J. C. Maan, M. Henini

    Research output: Contribution to journalArticlepeer-review


    We have investigated the interaction of phonons with a 2DEG in the FQH regime with phonon drag thermoelectric power (TEP). We find that the TEP at filling factors with the same even denominator is identical and at other even denominator filling factors they differ only by a constant. Assuming these states to be Composite Fermions (CF), we can explain our observations by extending a zero magnetic field theory for phonon drag to the CF-phonon interaction. This analysis is further corroborated by the observed T4 dependence of the CF TEP.
    Original languageEnglish
    Pages (from-to)2461-2462
    Number of pages1
    JournalCzechoslovak Journal of Physics
    Issue number5
    Publication statusPublished - 1996


    • phonon-drag contribution
    • 3d phonons
    • thermopower


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