Strong enhancement of transport by interaction on contact links

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.

Published version -- references corrected

References in corpus (3)

• Theory of a resonant level coupled to several conduction electron channels in equilibrium and out-of-equilibrium
• Residual conductance of correlated one-dimensional nanosystems: A numerical approach
• Coulomb blockade without potential barriers

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