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Pfaller, Sebastian ; Donarini, Andrea ; Grifoni, Milena

Subgap features due to quasiparticle tunneling in quantum dots coupled to superconducting leads

Pfaller, Sebastian, Donarini, Andrea und Grifoni, Milena (2013) Subgap features due to quasiparticle tunneling in quantum dots coupled to superconducting leads. Phys. Rev. B 87, S. 155439.

Veröffentlichungsdatum dieses Volltextes: 22 Mai 2013 14:07
Artikel
DOI zum Zitieren dieses Dokuments: 10.5283/epub.28224


Zusammenfassung

We present a microscopic theory of transport through quantum dot setups coupled to superconducting leads. We derive amaster equation for the reduced density matrix to lowest order in the tunneling Hamiltonian and focus on quasiparticle tunneling. For high enough temperatures transport occurs in the subgap region due to thermally excited quasiparticles, which can be used to observe excited states ...

We present a microscopic theory of transport through quantum dot setups coupled to superconducting leads. We derive amaster equation for the reduced density matrix to lowest order in the tunneling Hamiltonian and focus on quasiparticle tunneling. For high enough temperatures transport occurs in the subgap region due to thermally excited quasiparticles, which can be used to observe excited states of the system at low bias voltages. On the example of a double quantum dot we show how subgap transport spectroscopy can be done. Moreover, we use the single level quantum dot coupled to a normal and a superconducting lead to give a possible explanation for the subgap features observed in the experiments of Dirks, Chen, Birge, and Mason [Appl. Phys. Lett. 95, 192103 (2009)].



Beteiligte Einrichtungen


Details

DokumentenartArtikel
Titel eines Journals oder einer ZeitschriftPhys. Rev. B
Verlag:AMER PHYSICAL SOC
Ort der Veröffentlichung:COLLEGE PK
Band:87
Seitenbereich:S. 155439
Datum30 April 2013
InstitutionenPhysik > Institut für Theoretische Physik > Lehrstuhl Professor Grifoni > Arbeitsgruppe Milena Grifoni
Identifikationsnummer
WertTyp
10.1103/PhysRevB.87.155439DOI
Stichwörter / KeywordsANDREEV BOUND-STATES; TRANSPORT; JOSEPHSON;
Dewey-Dezimal-Klassifikation500 Naturwissenschaften und Mathematik > 530 Physik
StatusVeröffentlicht
BegutachtetJa, diese Version wurde begutachtet
An der Universität Regensburg entstandenJa
URN der UB Regensburgurn:nbn:de:bvb:355-epub-282245
Dokumenten-ID28224

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