1208.1089 (A. S. Mel'nikov et al.)

Interference phenomena and long - range proximity effect in clean
superconductor -- ferromagnet systems    [PDF]

A. S. Mel'nikov, A. V. Samokhvalov, S. M. Kuznetsova, A. I. Buzdin

We study peculiarities of proximity effect in clean superconductor -- ferromagnet structures caused by either spatial or momentum dependence of the exchange field. Even a small modulation of the exchange field along the quasiparticle trajectories is shown to provide a long range contribution to the supercurrent due to the specific interference of particle- and hole- like wave functions. The momentum dependence of the exchange field caused by the spin -- orbit interaction results in the long -- range superconducting correlations even in the absence of ferromagnetic domain structure and can explain the recent experiments on ferromagnetic nanowires.

View original: http://arxiv.org/abs/1208.1089