Tunneling spectroscopy for ferromagnet/superconductor junctions
Abstract
In tunneling spectroscopy studies of ferromagnet/superconductor (F/S) junctions, the effects of spin polarization, Fermi wavevector mismatch (FWM) between the F and S regions, and interfacial resistance play a crucial role. We study the low bias conductance spectrum of these junctions, governed by Andreev reflection at the F/S interface. We consider both d- and s-wave superconductors as well as mixed states of the form. We present results for a range of values of the relevant parameters and find that a rich variety of features appears, depending on pairing state and other conditions. We show that in the presence of FWM, spin polarization can enhance Andreev reflection and give rise to a zero bias conductance peak for an s-wave superconductor.
Cite
@article{arxiv.cond-mat/9902080,
title = {Tunneling spectroscopy for ferromagnet/superconductor junctions},
author = {Igor Zutic and Oriol T. Valls},
journal= {arXiv preprint arXiv:cond-mat/9902080},
year = {2009}
}
Comments
14 RevTex pages, 10 embedded ps figures