Quantum transport in diffusive microstructures in high magnetic fields

A. K. Geim, P. C. Main, L. Eaves, P. H. Beton

    Research output: Contribution to journalArticlepeer-review


    We have studied magnetotransport in diffusive submicron wires (n+-GaAs) at high magnetic fields where ωcτ>1. The system allowed us to follow a transition from orthodox mesoscopic behaviour to the regime of edge state transport. We found that for ωcτ>1 the universal conductance fluctuations (UCF) can no longer be scaled in terms of only one parameter, the phase coherence length. This breakdown of universal scaling is seen as a large increase of the Lee-Stone correlation field while the magnitude of UCF is unchanged in strong disagreement with the theoretical prediction. A qualitatively new magnetoresistance oscillatory effect has been observed at intermediate temperatures (10K
    Original languageEnglish
    Pages (from-to)11
    JournalSuperlattices and microstructures
    Issue number1
    Publication statusPublished - Jan 1993


    • conductance fluctuations
    • weak localization
    • temperature
    • magnetoresistance
    • conductivity
    • resistance
    • contacts
    • length
    • wires


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