Charge transport and Zener tunneling in small Josephson junctions with dissipation

Kuzmin, L. and Pashkin, Yu A. and Golubev, D. and Zaikin, A. (1996) Charge transport and Zener tunneling in small Josephson junctions with dissipation. Physical Review B - Condensed Matter and Materials Physics, 54 (14). pp. 10074-10080. ISSN 1098-0121

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Abstract

We have investigated a small-area Josephson tunnel junction in a superconducting quantum interference device (SQUID) geometry, biased through high-resistance thin-film leads. This configuration provides the necessary conditions for the observation of charging effects. The Josephson coupling energy (Formula presented) was varied by an external magnetic flux introduced into a SQUID loop. The current-voltage characteristics of the system were measured at low temperatures T∼80 mK and different values of (Formula presented). At a certain value of the current the Zener tunneling rate exceeds that of the dissipative relaxation and the system “jumps” from the lowest to higher Brillouin zones. This corresponds to a crossover on the I-V curve. The crossover current (Formula presented) was measured as a function of (Formula presented). Good agreement between our data and a theory of Zener tunneling with dissipation has been found.

Item Type: Journal Article
Journal or Publication Title: Physical Review B - Condensed Matter and Materials Physics
Departments: Faculty of Science and Technology > Physics
ID Code: 133847
Deposited By: ep_importer_pure
Deposited On: 20 May 2019 08:35
Refereed?: Yes
Published?: Published
Last Modified: 15 Oct 2019 05:15
URI: https://eprints.lancs.ac.uk/id/eprint/133847

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