Andreev bound states for a superconducting-ferromagnetic box

J. Koltai, J. Cserti, and C. J. Lambert
Phys. Rev. B 69, 092506 – Published 16 March 2004
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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.

  • Received 20 June 2003

DOI:https://doi.org/10.1103/PhysRevB.69.092506

©2004 American Physical Society

Authors & Affiliations

J. Koltai1, J. Cserti2,*, and C. J. Lambert3,†

  • 1Department of Biological Physics, Eötvös University, H-1117 Budapest, Pázmány Péter sétány 1/A, Hungary
  • 2Department of Physics of Complex Systems, Eötvös University, H-1117 Budapest, Pázmány Péter sétány 1/A, Hungary
  • 3Department of Physics, Lancaster University, Lancaster LA1 4YB, United Kingdom

  • *Electronic address: cserti@galahad.elte.hu
  • Electronic address: c.lambert@lancaster.ac.uk

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Issue

Vol. 69, Iss. 9 — 1 March 2004

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