Coherent current states in a two-band superconductor
DOI (Low Temperature Physics):
https://doi.org/10.1063/1.2737547Ключові 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)
Y.S. Yerin and A.N. Omelyanchouk, Coherent current states in a two-band superconductor, Low Temp. Phys. 33, (2007) [Fiz. Nizk. Temp. 33, 538-545, (2007)] DOI: https://doi.org/10.1063/1.2737547.
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