dc.contributor.author Eschrig, Matthias dc.contributor.author Cottet, Audrey dc.contributor.author Belzig, W dc.contributor.author Linder, Jacob dc.date.accessioned 2017-10-27T11:26:56Z dc.date.available 2017-10-27T11:26:56Z dc.date.created 2015-10-23T08:29:57Z dc.date.issued 2015 dc.identifier.issn 1367-2630 dc.identifier.uri http://hdl.handle.net/11250/2462583 dc.description.abstract Boundary conditions in quasiclassical theory of superconductivity are of crucial importance for describing proximity effects in heterostructures between different materials. Although they have been derived for the ballistic case in full generality, corresponding boundary conditions for the diffusive limit, described by Usadel theory, have been lacking for interfaces involving strongly spin-polarized materials, e.g. half-metallic ferromagnets. Given the current intense research in the emerging field of superconducting spintronics, the formulation of appropriate boundary conditions for the Usadel theory of diffusive superconductors in contact with strongly spin-polarized ferromagnets for arbitrary transmission probability and arbitrary spin-dependent interface scattering phases has been a burning open question. Here we close this gap and derive the full boundary conditions for quasiclassical Green functions in the diffusive limit, valid for any value of spin polarization, transmission probability, and spin-mixing angles (spin-dependent scattering phase shifts). Our formulation allows also for complex spin textures across the interface and for channel off-diagonal scattering (a necessary ingredient when the numbers of channels on the two sides of the interface differ). As an example we derive expressions for the proximity effect in diffusive systems involving half-metallic ferromagnets. In a superconductor/half-metal/superconductor Josephson junction we find ${\phi }_{0}$-junction behavior under certain interface conditions. nb_NO dc.language.iso eng nb_NO dc.publisher IOP Publishing nb_NO dc.rights Navngivelse 4.0 Internasjonal * dc.rights.uri http://creativecommons.org/licenses/by/4.0/deed.no * dc.title General boundary conditions for quasiclassical theory of superconductivity in the diffusive limit: Application to strongly spin-polarized systems nb_NO dc.type Journal article nb_NO dc.type Peer reviewed nb_NO dc.description.version publishedVersion nb_NO dc.source.volume 17 nb_NO dc.source.journal New Journal of Physics nb_NO dc.source.issue 8 nb_NO dc.identifier.doi 10.1088/1367-2630/17/8/083037 dc.identifier.cristin 1282957 dc.description.localcode Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. nb_NO cristin.unitcode 194,66,20,0 cristin.unitname Institutt for fysikk cristin.ispublished true cristin.fulltext preprint cristin.qualitycode 1
﻿

### This item appears in the following Collection(s)

Except where otherwise noted, this item's license is described as Navngivelse 4.0 Internasjonal