The In-Gap Charge Current through the Correlated Quantum Dot Hybridized with Superconductor

• Authors: A. Donabidowicz , T. Domański
• Languages of publication: EN

Abstracts

EN

We explore the Andreev tunnelling through the strongly correlated quantum dot embedded between the normal and superconducting electrodes. For a small external voltage |eV| <∆_s the electron arriving from the normal lead can be converted into a pair on the quantum dot and further propagates in the superconducting lead while simultaneously the hole is reflected back to the normal electrode. Conductance of such anomalous current is very sensitive to the particle-hole mixing of the quantum dot spectrum. We analyze the influence of the proximity effect and the Coulomb interactions on the differential Andreev conductance focusing on the extreme limit ∆_s → ∞.

Keywords

EN

73.23.-b; 74.20.Fg; 74.45.+c

Discipline

• 74.20.Fg: BCS theory and its development
• 74.45.+c: Proximity effects; Andreev reflection; SN and SNS junctions
• 73.23.-b: Electronic transport in mesoscopic systems

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2008
• Volume: 114
• Issue: 1
• Pages: 75-82

Dates

published

2008-07

received

2007-11-06

Contributors

author

A. Donabidowicz

• Institute of Physics, M. Curie-Skłodowska University, pl. M. Curie-Skłodowskiej 1, 20-031 Lublin, Poland

author

T. Domański

• Institute of Physics, M. Curie-Skłodowska University, pl. M. Curie-Skłodowskiej 1, 20-031 Lublin, Poland

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Identifiers

DOI

10.12693/APhysPolA.114.75