Abstract
We study triplet pairing correlations in clean ferromagnet ()/superconductor () nanojunctions, via fully self-consistent solution of the Bogoliubov–de Gennes equations. We consider FSF trilayers, with being an -wave superconductor, and an arbitrary angle between the magnetizations of the two layers. We find that contrary to some previous expectations, triplet correlations, odd in time, are induced in both the and layers in the clean limit. We investigate their behavior as a function of time, position, and . The triplet amplitudes are largest at times on the order of the inverse Debye frequency, and at that time scale they are long-ranged in both and . The zero temperature condensation energy is found to be lowest when the magnetizations are antiparallel.
- Received 4 April 2007
DOI:https://doi.org/10.1103/PhysRevLett.99.127002
©2007 American Physical Society