Strong enhancement of transport by interaction on contact links

Details Strong enhancement of transport by interaction on contact links Strong enhancement of transport by interaction on contact links

2007-04-15

arxiv.org/abs/0704.1917v3

Phys. Rev. B 75, 241103(R) (2007)

Physics

Condensed Matter

Strongly Correlated Electrons

Published version -- references corrected

Scientific paper

10.1103/PhysRevB.75.241103

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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