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Andreev scattering and cotunneling between two superconductor-normal metal interfaces: the dirty limit

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  • D. Feinberg

Abstract

Crossed Andreev reflections and cotunneling occur between two neighbouring superconductor- normal metal or superconducting-ferromagnet interfaces. Previous works assumed a clean BCS superconductor. Here the calculation of the corresponding crossed conductance terms is generalized to a dirty superconductor. The range of the effect is shown to be the coherence length $\tilde{\xi}=\sqrt{\hbar D/\Delta}$ , instead of the BCS coherence length $\xi_0$ . Moreover, in three dimensions, the algebraic prefactor scales as 1/r instead of 1/r 2 . The calculation involves the virtual diffusion probability of quasiparticles below the superconducting gap, in the normal and the anomalous channel. Copyright Springer-Verlag Berlin/Heidelberg 2003

Suggested Citation

  • D. Feinberg, 2003. "Andreev scattering and cotunneling between two superconductor-normal metal interfaces: the dirty limit," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 36(3), pages 419-422, December.
    • Handle: RePEc:spr:eurphb:v:36:y:2003:i:3:p:419-422
    DOI: 10.1140/epjb/e2003-00361-6
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