Josephson Effect in Fulde-Ferrell-Larkin-Ovchinnikov Superconductors

Details Josephson Effect in Fulde-Ferrell-Larkin-Ovchinnikov Superconductors Josephson Effect in Fulde-Ferrell-Larkin-Ovchinnikov Superconductors

1999-12-20

arxiv.org/abs/cond-mat/9912364v1

Phys. Rev. Lett. 84, 4970 (2000).

Physics

Condensed Matter

Superconductivity

4 pages with one embedded eps figure

Scientific paper

10.1103/PhysRevLett.84.4970

Due to the difference in the momenta of the superconducting order parameters, the Josephson current in a Josephson junction between a Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) superconductor and a conventional BCS superconductor is suppressed. We show that the Josephson current may be recovered by applying a magnetic field in the junction. The field strength and direction at which the supercurrent recovery occurs depend upon the momentum and structure of the order parameter in the FFLO state. Thus the Josephson effect provides an unambiguous way to detect the existence of an FFLO state, and to measure the momentum of the order parameter.

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