Andreev bound states for a superconducting-ferromagnetic box
J. Koltai, J. Cserti, C. J. Lambert
DOI 10.1103/PhysRevB.69.092506 · Physical Review B
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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.
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