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- Title
Triplet pairing states with equal spins in ferromagnet/superconductor heterojunctions for noncollinear magnetizations.
- Authors
Niu, Z. P.; Zheng, Z. M.; Xing, D. Y.
- Abstract
Four-component Bogoliubov-de Gennes equations are applied to study tunneling conductance spectra of ferromagnet/ferromagnet/d-wave superconductor (F1/F2/d-wave S) tunnel junctions and to find out signs of spin-triplet pairing correlations induced in the proximity structure. The pairing correlations with equal spins arises from the novel Andreev reflection (AR), which requires at least three factors: the usual AR at the F2/S interface, spin flip in the F2 layer, and superconducting coherence kept up in the F2 layer. Effects of angle α between magnetizations of the two F layers, polarizations of the F1 and F2 layers, the thickness of the F2 layer, and the orientation of the d-wave S crystal on the tunneling conductance are investigated. A conversion from a zero-bias conductance dip at α = 0 to a zero-bias conductance peak at a certain value of α can be seen as a sign of generated spin-triplet correlations.
- Subjects
EQUATIONS; MATHEMATICS; MINING engineering; WAVE functions; UNDERGROUND construction; HARTREE-Fock approximation
- Publication
European Physical Journal B: Condensed Matter, 2007, Vol 60, Issue 3, p281
- ISSN
1434-6028
- Publication type
Article
- DOI
10.1140/epjb/e2007-00359-0