2011/01/31 by Luka Trifunovic
Physics and Astronomy · #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevlett.107.047001
published as Phys. Rev. Lett. 107, 047001 (2011) · 4 pages, 3 figures
arxiv created 2011/07/23 · arxiv updated 2015/03/18
We consider a long superconductor-ferromagnet-superconductor junction with one spin-active region. It is shown that an odd number of Cooper pairs cannot have a long-range propagation when there is only one spin-active region. When temperature is much lower than the Thouless energy, the coherent transport of two Cooper pairs becomes dominant process and the superharmonic current-phase relation is obtained (I∝sin2ϕ).