Andreev bound states for superconducting-ferromagnetic box

Details Andreev bound states for superconducting-ferromagnetic box Andreev bound states for superconducting-ferromagnetic box

2003-06-20

arxiv.org/abs/cond-mat/0306523v1

Physical Review B 69, 092506 (2004)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 6 figures

Scientific paper

10.1103/PhysRevB.69.092506

Within the microscopic Bogoliubov--de Gennes (BdG) formalism an exact quantization condition for Andreev bound states of the ferromagnetic-superconducting hybrid systems of box geometry is derived and a semi-classical formula for the density of states is obtained. The semi-classical formula is shown to agree with the exact result, even when the exchange field $h$, is much larger than the superconductor order parameter, provided $h$ is small compared with the Fermi energy.

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