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Temperature dependence of Andreev spectra in a superconducting carbon nanotube quantum dot

Author
Kumar, A.; Gaim, M.; Steininger, D.; Levy-Yeyati Mizrahi, Alfredountranslated; Martín-Rodero, A.; Hüttel, A. K.; Strunk, C.
Entity
UAM. Departamento de Física Teórica de la Materia Condensada
Publisher
American Physical Society
Date
2014-02-24
Citation
10.1103/PhysRevB.89.075428
Physical Review B 89.7 (2014): 075428
 
 
 
ISSN
1098-0121 (print); 1550-235X (online)
DOI
10.1103/PhysRevB.89.075428
Funded by
We gratefully acknowledge financial support from the Deutsche Forschungsgemeinschaft within GRK 1570, SFB 689, the E. Noether program (Hu 1808-1), from Spanish MINECO through grant FIS2011-26516, and from the EU FP7 Project SE2ND. from the EU FP7 Project SE2ND. A. K. thanks the Alexander von Humboldt Foundation for providing - nancial support during this research
Project
info:eu-repo/grantAgreement/EC/FP7/271554; Gobierno de España. FIS2011-26516
Editor's Version
http://dx.doi.org/10.1103/PhysRevB.89.075428
Subjects
Spectroscopy; Superconducting Anderson model; Física
URI
http://hdl.handle.net/10486/668839
Rights
© 2014 American Physical Society

Abstract

Tunneling spectroscopy of a Nb coupled carbon nanotube quantum dot reveals the formation of pairs of Andreev bound states (ABS) within the superconducting gap. A weak replica of the lower ABS is found, which is generated by quasi-particle tunnelling from the ABS to the Al tunnel probe. An inversion of the ABS-dispersion is observed at elevated temperatures, which signals the thermal occupation of the upper ABS. Our experimental findings are well supported by model calculations based on the superconducting Anderson model
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Google™ Scholar:Kumar, A. - Gaim, M. - Steininger, D. - Levy-Yeyati Mizrahi, Alfredo - Martín-Rodero, A. - Hüttel, A. K. - Strunk, C.

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  • Producción científica en acceso abierto de la UAM [17219]

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