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Title: Andreev tunneling in quantum dots: A slave-boson approach
Authors: Schwab, Peter
Raimondi, Roberto
Keywords: Andreev scattering
Kondo effect
proximity effect
strongly correlated systems
Issue Date: 1999
Publisher: American Physical Society
Source: 16
Abstract: We study a strongly interacting quantum dot connected to a normal and to a superconducting lead. By means of the slave-boson technique we investigate the low-temperature regime and discuss electrical transport through the dot. At the level of mean-field approximation we are able to discuss both limits of small and large Δ/TK, where Δ is the superconducting gap and TK is the Kondo temperature. We also find that the zero-bias anomaly in the current-voltage characteristics, which is associated with the occurrence of the Kondo resonance in the quantum dot, is enhanced in the presence of superconductivity, due to resonant Andreev scattering.
ISSN: 1550-235x
DOI: 10.1103/PhysRevB.59.1637
Appears in Collections:A - Articolo su rivista
X_Dipartimento di Fisica 'Edoardo Amaldi'

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