Andreev states and spontaneous spin currents in superconductor-ferromagnet proximity systems

JF Annett, BL Gyorffy, MA Krawiec

Research output: Chapter in Book/Report/Conference proceedingChapter in a book

Abstract

The proximity e.ect between a ferromagnet and a superconductor is examined within the framework of the self-consistent Bogoliubov de Gennes equations. It is shown that for a thin ferromagnetic layer on a semi-in.nite superconductor, a spontaneous supercurrent may .ow parallel to the interface. The current turns on or off repeatedly as a function of the exchange splitting, Eex for a fixed thickness film, d. It is shown that the current state is stabilized by a lowering of the total quasiparticle kinetic energy, and this is interpreted in terms of the Andreev bound states in the ferromagnetic layer.
Translated title of the contributionAndreev states and spontaneous spin currents in superconductor-ferromagnet proximity systems
Original languageEnglish
Title of host publicationElectron Correlation in New Materials and Nanosystems
EditorsKurt Scharnberg, Sergei Kruchinin
PublisherSpringer Netherlands
Pages317 - 324
Number of pages8
ISBN (Print)9781402056574
Publication statusPublished - 2007

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