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VOLUME 75 | ISSUE 11 | PAGE 709
Nonsinusoidal current--phase relation in SFS Josephson junctions
A. A. Golubov +, M. Yu. Kupriyanov * 1), Ya. V. Fominov^{ \square + 1)}
+Department of Applied Physics, University of Twente, 7500 AE Enschede, The Netherlands
*Nuclear Physics Institute, Moscow State University, 119899 Moscow, Russia
^\squareL. D. Landau Institute for Theoretical Physics RAS, 117940 Moscow, Russia


PACS: 74.50.+r, 74.80.-g, 75.30.Et
Abstract
Various types of the current-phase relation I(\varphi) in superconductor-ferromagnet-superconductor (SFS) point contacts and planar double-barrier junctions are studied within the quasiclassical theory in the limit of thin diffusive ferromagnetic interlayers. The physical mechanisms leading to highly nontrivial I(\varphi) dependence are identified by studying the spectral supercurrent density. These mechanisms are also responsible for the 0-π transition in SFS Josephson junctions.


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