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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)].
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Details
| Dokumentenart | Artikel | ||||
| Titel eines Journals oder einer Zeitschrift | Phys. Rev. B | ||||
| Verlag: | AMER PHYSICAL SOC | ||||
|---|---|---|---|---|---|
| Ort der Veröffentlichung: | COLLEGE PK | ||||
| Band: | 87 | ||||
| Seitenbereich: | S. 155439 | ||||
| Datum | 30 April 2013 | ||||
| Institutionen | Physik > Institut für Theoretische Physik > Lehrstuhl Professor Grifoni > Arbeitsgruppe Milena Grifoni | ||||
| Identifikationsnummer |
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| Stichwörter / Keywords | ANDREEV BOUND-STATES; TRANSPORT; JOSEPHSON; | ||||
| Dewey-Dezimal-Klassifikation | 500 Naturwissenschaften und Mathematik > 530 Physik | ||||
| Status | Veröffentlicht | ||||
| Begutachtet | Ja, diese Version wurde begutachtet | ||||
| An der Universität Regensburg entstanden | Ja | ||||
| URN der UB Regensburg | urn:nbn:de:bvb:355-epub-282245 | ||||
| Dokumenten-ID | 28224 |
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