2008/01/31 by Luca Dell’Anna, L. Dell'Anna, Alex Zazunov +3 · 1 citation
Physics and Astronomy · #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #Semiconductor Quantum Structures and Devices #cond-mat.mes-hall #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.77.104525
published as Phys. Rev. B 77, 104525 (2008) · 6 pages, 6 figures, replaced with published version
openalex publication_date 2008/03/25 · arxiv created 2008/03/26 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We study the out-of-equilibrium current through an interacting quantum dot, which is modeled as an Anderson impurity contacted by two BCS superconductors held at fixed voltage bias. In order to account for multiple Andreev reflections, we develop a Keldysh Green's function scheme perturbative in the dot's interaction strength. We find an unexpected enhancement of the current due to repulsive interactions for small to intermediate lead-to-dot couplings.