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Theory of Andreev resonances in quantum dots

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<mark>Journal publication date</mark>20/07/1996
<mark>Journal</mark>Surface Science
Volume361-362
Number of pages4
Pages (from-to)302-305
Publication StatusPublished
<mark>Original language</mark>English

Abstract

We present theoretical results for the electrical conductance G of a quantum dot in the presence of superconductivity. After deriving a generalization of the well-known Breit-Wigner formula, valid in the presence of superconducting leads, results for the distribution of conductance resonances are derived. For a normal (N) contact-normal dot (NDOT)-superconducting (S) contact, as the order parameter Δ of the S contact tends to zero, recent predictions for the resonant structure of a normal chaotic dot are reproduced. When Δ increases from zero, for finite applied voltage, resonances are destroyed.