Coherent current states in a two-band superconductor

Автор(и)

  • Y.S. Yerin B. Verkin Istitute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine
  • A.N. Omelyanchouk B. Verkin Istitute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine

DOI:

https://doi.org/10.1063/1.2737547

Ключові слова:

current states, two-band superconductivity, proximity effect, drag effect, Josephson microbridge, p-junction.

Анотація

Homogeneous cur rent states in thin films and Josephson current in superconducting microbridges are studied within the frame of a two-band Ginzburg–Landau theory. By solving the coupled sys tem of equations for two order parameters the depairing current curves and Josephson current-phase relation are calculated for different values of phenomenological parameters g and h. Coefficients g and h de scribe the coupling of order parameters (proximity effect) and their gradients (drag effect), respectively. For definite values of parameters the dependence of cur rent j on superfluid momentum q contains local minimum and corresponding bistable states. It is shown that the Josephson microbridge from two-band superconductor can demonstrate p-junction behavior.

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Опубліковано

2007-03-26

Як цитувати

(1)
Yerin, Y.; Omelyanchouk, A. Coherent Current States in a Two-Band Superconductor. Fiz. Nizk. Temp. 2007, 33, 538-545.

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Надпровідність, зокрема високотемпературна

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