Josephson current versus potential strength of the interface in ferromagnetic superconductors

doi:10.1088/1674-1056/23/5/057402

Abstract Based on the scattering theory, we calculate the Josephson current in a junction between two ferromagnetic superconductors as a function of the interface potential z. We consider the ferromagnetic superconductor (FS) in three different Cooper pairing states: spin singlet s-wave pairing (SWP) state, spin triplet opposite spin pairing (OSP) state, and spin triplet equal spin pairing (ESP) state. We find that the critical Josephson current as a function of z shows clear differences among the SWP, OSP, and ESP states. The obtained results can be used as a useful tool for determining the pair symmetry of the ferromagnetic superconductors.

Keywords: ferromagnetic superconductors spin singlet s-wave pairing state spin triplet opposite spin pairing state spin triplet equal spin pairing state

Received: 09 September 2013
Revised: 04 December 2013
Accepted manuscript online:

PACS:

74.45.+c

(Proximity effects; Andreev reflection; SN and SNS junctions)

Fund: Project supported by the Iran National Science Foundation (INSF).

Corresponding Authors: Hamidreza Emamipour
E-mail: h_emamipour@yahoo.com

About author: 74.45.+c

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Hamidreza Emamipour Josephson current versus potential strength of the interface in ferromagnetic superconductors 2014 Chin. Phys. B 23 057402

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