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 contribution | Andreev states and spontaneous spin currents in superconductor-ferromagnet proximity systems |
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Original language | English |
Title of host publication | Electron Correlation in New Materials and Nanosystems |
Editors | Kurt Scharnberg, Sergei Kruchinin |
Publisher | Springer Netherlands |
Pages | 317 - 324 |
Number of pages | 8 |
ISBN (Print) | 9781402056574 |
Publication status | Published - 2007 |