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Andreev bound states for a superconducting-ferromagnetic box.

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<mark>Journal publication date</mark>2004
<mark>Journal</mark>Physical Review B
Issue number9
Volume69
Pages (from-to)092506
<mark>State</mark>Published
<mark>Original language</mark>English

Abstract

Within the microscopic Bogoliubov–de Gennes formalism an exact quantization condition for Andreev bound states of the ferromagnetic-superconducting hybrid systems of box geometry is derived and a semiclassical formula for the density of states is obtained. The semiclassical 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.