Quantum dot between two superconductors

Y. Avishai, A. Golub, A. D. Zaikin

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

Novel effects emerge from an interplay between multiple Andreev reflections and Coulomb interaction in a quantum dot coupled to superconducting leads and subject to a finite potential bias V. Combining an intuitive physical picture with a rigorous path integral formalism, we evaluate the current I through the dot and find that the interaction shifts the subharmonic pattern of the I-V curve toward higher V. For a sufficiently strong interaction the subgap current (at eV < 2Δ) is virtually suppressed.

Original languageEnglish
Pages (from-to)640-646
Number of pages7
JournalEurophysics Letters
Volume54
Issue number5
DOIs
StatePublished - 1 Jun 2001

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