Observation of thermally excited charge transport modes in a superconducting single-electron transistor

Manninen, A. J. and Pashkin, Yuri and Korotkov, A. N. and Pekola, Jukka P. (1997) Observation of thermally excited charge transport modes in a superconducting single-electron transistor. EPL, 39 (3). ISSN 0295-5075

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Abstract

Experiments on a superconducting single-electron transistor are reported. A new structure in the current-voltage characteristics at subgap voltages was observed when temperature was not too low as compared to the superconducting transition temperature Tc of the sample. The strength of the anomalies increases exponentially with temperature. The dominating features arise from matching of singularities in the density of states on two sides of a tunnel junction, and from the Josephson-quasiparticle cycle. Thermal excitations are essential for the former process, and they also make the latter process possible at low voltages.

Item Type: Journal Article
Journal or Publication Title: EPL
Uncontrolled Keywords: /dk/atira/pure/subjectarea/asjc/3100
Subjects:
Departments: Faculty of Science and Technology > Physics
ID Code: 84754
Deposited By: ep_importer_pure
Deposited On: 20 Feb 2017 09:06
Refereed?: Yes
Published?: Published
Last Modified: 30 Sep 2019 20:04
URI: https://eprints.lancs.ac.uk/id/eprint/84754

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