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arXiv · 0704.1917

Strong enhancement of transport by interaction on contact links

Dan Bohr·Peter 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. Further, we demonstrate that these results are independent of the high-energy cutoff and that the relevant scale is set by the Fermi velocity.

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Dan Bohr, Peter Schmitteckert. 2007-06-18. Strong enhancement of transport by interaction on contact links. https://doi.org/10.1103/physrevb.75.241103

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