Interaction-Induced Renormalization of Andreev Reflection

M. Titov, M. Müller, and W. Belzig
Phys. Rev. Lett. 97, 237006 – Published 8 December 2006

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 (1999)].

  • Figure
  • Received 1 August 2006

DOI:https://doi.org/10.1103/PhysRevLett.97.237006

©2006 American Physical Society

Authors & Affiliations

M. Titov, M. Müller, and W. Belzig

  • Department of Physics, University of Konstanz, D-78457 Konstanz, Germany

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Issue

Vol. 97, Iss. 23 — 8 December 2006

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