Strong enhancement of transport by interaction on contact links

Dan Bohr, P. Schmitteckert

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    Abstract

    Strong repulsive interactions within a one-dimensional Fermi system in a two-probe configuration normally lead to a reduced off-resonance conductance. We show that if the repulsive interaction extends to the contact regions, a strong increase of the conductance may occur, even for systems where one would expect to find a reduced conductance. An essential ingredient in our calculations is a momentum-space representation of the leads, which allows a high energy resolution. Furthermore, we demonstrate that these results are independent of the high-energy cutoff and that the relevant scale is set by the Fermi velocity.
    Original languageEnglish
    JournalPhysical Review B Condensed Matter
    Volume75
    Issue number24
    Pages (from-to)241103
    ISSN0163-1829
    DOIs
    Publication statusPublished - 2007

    Bibliographical note

    Copyright 2007 American Physical Society

    Keywords

    • CONDUCTANCE

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