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PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS
Volume 404, Issue 1-4, Pages 153-157Publisher
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DOI: 10.1016/j.physc.2003.10.035
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Methods for investigating Andreev bound states in superconducting vortices continue to be of experimental and theoretical interest [Phys. Rev, Lett. 90 (2003) 177002]. We have recently developed a semiclassical theory of quasiparticles in the superconducting state [Ann. Phy. (N-Y) 298 (2002) 273]. It is based upon the study of classical orbits, the Bogoliubov-de Gennes equation being replaced by Hamiltonian systems describing an effective (fictions) classical mechanics. The orbits are quantised using a generalisation of the Bohr-Sommerfeld or EBK quantisation rule which includes both a Maslov index and an additional topological integer arising from the lines of phase singularity running along the vortex cores. We deploy this theory to the spectra of a single giant vortex. (C) 2004 Elsevier B.V. All rights reserved.
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