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Title: Josephson flux-flow oscillator: The microscopic tunneling approach
Authors: Gulevich, Dmitry R.
Koshelets, V.P.
Kusmartsev, F.V.
Issue Date: 2017
Publisher: © American Physical Society
Citation: GULEVICH, D.R., KOSHELETS, V.P. and KUSMARTSEV, F.V., 2017. Josephson flux-flow oscillator: The microscopic tunneling approach. Physical Review B, 96 (2), 024515-1 - 024515-12.
Abstract: We elaborate a theoretical description of large Josephson junctions which is based on Werthamer's microscopic tunneling theory. The model naturally incorporates coupling of electromagnetic radiation to the tunnel currents and, therefore, is particularly suitable for description of the self-coupling effect in Josephson junction. In our numerical calculations we treat the arising integro-differential equation, which describes temporal evolution of the superconducting phase difference coupled to the electromagnetic field, by the Odintsov-Semenov-Zorin algorithm. This allows us to avoid evaluation of the time integrals at each time step while taking into account all the memory effects. To validate the obtained microscopic model of large Josephson junction we focus our attention on the Josephson flux-flow oscillator. The proposed microscopic model of flux-flow oscillator does not involve the phenomenological damping parameter, rather the damping is taken into account naturally in the tunnel current amplitudes calculated at a given temperature. The theoretically calculated current-voltage characteristics is compared to our experimental results obtained for a set of fabricated flux-flow oscillators of different lengths.
Description: This paper was accepted for publication in the journal Physical Review B and is also available at http://dx.doi.org/10.1103/PhysRevB.96.024515.
Version: Published
DOI: 10.1103/PhysRevB.96.024515
URI: https://dspace.lboro.ac.uk/2134/26130
Publisher Link: http://dx.doi.org/10.1103/PhysRevB.96.024515
ISSN: 2469-9950
Appears in Collections:Published Articles (Physics)

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