Resonant peak in the density of states in the normal metal / diffusive ferromagnet / superconductor junctions

Details Resonant peak in the density of states in the normal metal / diffusive ferromagnet / superconductor junctions Resonant peak in the density of states in the normal metal / diffusive ferromagnet / superconductor junctions

2005-10-25

arxiv.org/abs/cond-mat/0510657v1

Phys. Rev. B 72, 052512 (2005)

Physics

Condensed Matter

Superconductivity

4 pages, 4 figures

Scientific paper

10.1103/PhysRevB.72.052512

The conditions for the formation of zero-energy peak in the density of states (DOS) in the normal metal / insulator / diffusive ferromagnet / insulator / s-wave superconductor (N/I/DF/I/S) junctions are studied by solving the Usadel equations. The DOS of the DF is calculated in various regimes for different magnitudes of the resistance, Thouless energy and the exchange field of the DF, as well as for various resistances of the insulating barriers. The conditions for the DOS peak are formulated for the cases of weak proximity effect (large resistance of the DF/S interface) and strong proximity effect (small resistance of the DF/S interface).

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