Asymmetric Scattering and Diffraction of 2-Dimensional Electrons at Quantized Tubes of Magnetic-Flux

A K Geim, S J Bending, Irina V Grigorieva

    Research output: Contribution to journalArticlepeer-review

    Abstract

    The Hall conductivity of a high-mobility two-dimensional electron gas (2DEG) has been investigated in a distribution of quantized magnetic flux tubes (vortices) formed at a type-II superconducting "gate" layer. A pronounced suppression of the Hall effect was observed for long Fermi wavelengths (as compared to the submicron vortex size) indicating a situation where electrons are diffracted by the flux quanta. In contrast, for shorter Fermi wavelengths the Hall conductivity has been found to be insensitive to the extreme inhomogeneity of the magnetic field and determined by the average field.
    Original languageEnglish
    Pages (from-to)2252-2255
    Number of pages4
    JournalPhysical Review Letters
    Volume69
    Issue number15
    Publication statusPublished - 1992

    Keywords

    • weak localization
    • magnetoresistance
    • superconductor
    • field
    • gas

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