2004•Physical Review LettersOpen access

Andreev Reflection Eigenvalue Density in Mesoscopic Conductors

Peter Samuelsson, Wolfgang Belzig, Yuli V. Nazarov

Abstract

The energy-dependent Andreev reflection eigenvalues determine the transport properties of normal-superconducting systems. We evaluate the eigenvalue density to get insight into the formation of resonant electron-hole transport channels. The circuit-theory-like method developed can be applied to any generic mesoscopic conductor or combinations thereof. We present the results for experimentally relevant cases of a diffusive wire and a double tunnel junction.

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Key concepts: Mesoscopic physics, Andreev reflection, Eigenvalues and eigenvectors, Conductor, Electrical conductor, Reflection (computer programming), Condensed matter physics, Superconductivity