Electronic structure of edge and vortex states in chiral mesoscopic superconductor

Details Electronic structure of edge and vortex states in chiral mesoscopic superconductor Electronic structure of edge and vortex states in chiral mesoscopic superconductor

2008-03-24

arxiv.org/abs/0803.3378v2

JETP letters v.87 p.511 (2008)

Physics

Condensed Matter

Superconductivity

6 pages, 2 figures

Scientific paper

We study a subgap quasiparticle spectrum in a mesoscopic disk of chiral superconductor. We find an exact expression for the spectrum of surface states localized at the disk edge. Considering an Abrikosov vortex placed at the center of a superconducting disk we investigate the spectrum transformation near the intersection points of surface and vortex anomalous energy branches . The resulting splitting of the anomalous branches due to the hybridization of edge and vortex states is determined by an external magnetic field and can lead in particular to the formation of a set of minigaps in the quasiparticle spectrum. Tuning the external magnetic field makes it possible to control the width of minigaps and the positions of corresponding density of states singularities at the minigaps edges.

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