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Diagrammatic perturbation technique for a quantum dot connected to superconducting leads
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SYSNO ASEP 0430517 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Diagrammatic perturbation technique for a quantum dot connected to superconducting leads Author(s) Pokorný, Vladislav (FZU-D) RID, ORCID
Janiš, Václav (FZU-D) RID, ORCID, SAI
Novotný, T. (CZ)
Žonda, M. (CZ)Source Title Acta Physica Polonica A, vol. 126, 2014, č. 1. - Warsaw : Polish Academy of Sciences, 2014 - ISSN 0587-4246 Pages s. 352-353 Number of pages 2 s. Publication form Print - P Action Czech and Slovak Conference on Magnetism /15./ Event date 17.06.2013-21.06.2013 VEvent location Košice Country CZ - Czech Republic Event type WRD Language eng - English Country PL - Poland Keywords superconductivity ; quantum dots ; perturbation expansion ; Josephson junction Subject RIV BM - Solid Matter Physics ; Magnetism R&D Projects GCP204/11/J042 GA ČR - Czech Science Foundation (CSF) Institutional support FZU-D - RVO:68378271 EID SCOPUS 84902160147 DOI 10.12693/APhysPolA.126.352 Annotation We study the spectral properties of a quantum dot embedded between two superconductors showing a phase difference. The system is described as a single-impurity Anderson model coupled to BCS superconducting leads. We utilize diagrammatic perturbation techniques in the Coulomb interaction to capture the relevant physical phenomena, particularly the effect of Coulomb interaction on the Andreev bound states present in the electronic spectrum. Results of the Hartree - Fock approximation and the random phase approximation at zero temperature are presented. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2014
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