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$pi-0$ Transition in Superconductor-Ferromagnetic-Superconductor Junctions | | N.M. Chtchelkatchev
; W. Belzig
; Yu.V. Nazarov
; C. Bruder
; | | Date: |
9 Aug 2001 | | Journal: | JETP Lett, Vol. 74, 323 (2001) [Pis’ma v Zh. Eksp. i Teor. Fiz. Vol. 74, 357 (2001)] | | Subject: | Mesoscopic Systems and Quantum Hall Effect | cond-mat.mes-hall | | Affiliation: | L.D. Landau Institute for Theoretical Physics, Departement Physik und Astronomie, Universität Basel, Delft University of Technology | | Abstract: | Superconductor-Ferromagnetic-Superconductor (SFS) Josephson junctions are known to exhibit a transition between $pi$ and 0 states. In this note we find the $pi-0$ phase diagram of an SFS junction depending on the transparency of an intermediate insulating layer (I). We show that in general, the Josephson critical current is nonzero at the $pi-0$ transition temperature. Contributions to the current from the two spin channels nearly compensate each other and the first harmonic of the Josephson current as a function of phase difference is suppressed. However, higher harmonics give a nonzero contribution to the supercurrent. | | Source: | arXiv, cond-mat/0108165 | | Services: | Forum | Review | PDF | Favorites | |
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