Saturation of the subgap quasiparticle current in Nb/AlOx/Nb high quality Josephson junctions at very low temperatures

Cristiano, R; Frunzio, L; Falci, Giuseppe; Tagliacozzo, A; BE Mugnai, D; Ranfagni, A; Schulman, Ls

The subgap quasiparticle current I-qp in Josephson junctions may be affected by thermal and quantum fluctuations of the electromagnetic environment. To mimic a realistic setup, the environment is assumed not to be in thermal equilibrium with the junction. At very low temperatures of the junction I-qp is finite, instead of being exponentially suppressed, as predicted by the BCS theory. It depends on the impedance of the circuit. We use our simple model to interpret the observed flattening of I-qp in Nb/AlOx/Nb high quality junctions.

Titolo:	Saturation of the subgap quasiparticle current in Nb/AlOx/Nb high quality Josephson junctions at very low temperatures
Autori interni:	Cristiano R Frunzio L FALCI, Giuseppe Tagliacozzo A BE Mugnai D Ranfagni A Schulman LS mostra contributor esterni nascondi contributor esterni
Data di pubblicazione:	1997
Handle:	http://hdl.handle.net/20.500.11769/59905
Appare nelle tipologie:	2.1 Contributo in volume (Capitolo o Saggio)

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http://hdl.handle.net/20.500.11769/59905

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