Interaction-induced Renormalization of Andreev Reflection
Mesoscale and Nanoscale Physics
2009-11-11 v1 Superconductivity
Abstract
We analyze the charge transport between a one-dimensional weakly interacting electron gas and a superconductor within the scaling approach in the basis of scattering states. We derive the renormalization group equations, which fully account for the intrinsic energy dependence due to Andreev reflection. A strong renormalization of the corresponding reflection phase is predicted even for a perfectly transparent metal-superconductor interface. The interaction-induced suppression of the Andreev conductance is shown to be highly sensitive to the normal state resistance, providing a possible explanation of experiments with carbon-nanotube/superconductor junctions by Morpurgo et al. [Science 286, 263 (2001)].
Cite
@article{arxiv.cond-mat/0608017,
title = {Interaction-induced Renormalization of Andreev Reflection},
author = {M. Titov and M. Mueller and W. Belzig},
journal= {arXiv preprint arXiv:cond-mat/0608017},
year = {2009}
}
Comments
4 pages, 2 figures