2002/06/30 by M. Eschrig, J. Kopu, J. C. Cuevas +1
Physics and Astronomy · #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevlett.90.137003
published as Phys. Rev. Lett. 90, 137003 (2003) and Virtual Journal of Applications of Superconductivity, Vol. 4, Issue 8 (2003) · replaced with published version
arxiv created 2006/03/28 · arxiv updated 2009/11/30
We investigate the coupling between two singlet superconductors separated by a half-metallic magnet. The mechanism behind the coupling is provided by the rotation of the quasiparticle spin in the superconductor during reflection events at the interface with the half metal. Spin rotation induces triplet correlations in the superconductor which, in the presence of surface spin-flip scattering, result in an indirect Josephson effect between the superconductors. We present a theory appropriate for studying this phenomenon and calculate physical properties for a superconductor/half metal/superconductor (S/HM/S) heterostructure.