Quasi-Particle Spectrum around a Single Vortex in Superconductors - s-Wave Case -
Abstract
Making use of the Bogoliubov-de Gennes equation, we study the quasi-particle spectrum and the vortex core structure of a single vortex in quasi 2D s-wave superconductors for small pF xi0, where pF is the Fermi momentum and xi0=vF/Delta0 is the coherence length (hbar=1). During our numerical calculation the particle number is conserved for each pF xi0. In particular, we find that there are only 1 or 2 bound states for pF xi0=1. Also, for pF xi0=1, the Kramer-Pesch effect ceases to exist at around T/Tc= 0.3.
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