Kondo resonance, Coulomb blockade, and Andreev transport through a quantum dot
- 15 October 1998
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 58 (15) , 9641-9643
- https://doi.org/10.1103/physrevb.58.9641
Abstract
We study resonant tunneling through an interacting quantum dot coupled to normal metallic and superconducting leads. We show that large Coulomb interaction gives rise to interesting effects in Andreev transport. Adopting an exact relation for the Green’s function, we find that at zero temperature, the linear response conductance is enhanced due to Kondo-Andreev resonance in the Kondo limit, while it is suppressed in the empty site limit. In the Coulomb blockaded region, on the other hand, the conductance is reduced more than the corresponding conductance with normal leads because large charging energy suppresses Andreev reflection.Keywords
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