Electronic structure of a Josephson vortex in a SIS junction
Vadim Plastovets, A. S. Mel'nikov
DOI 10.1103/PhysRevB.105.094516 · Physical Review B
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Abstract
The Josephson vortex formed in a superconductor-insulator-superconductor (SIS) junction can affect the quantum mechanics of quasiparticles by creating an effective adiabatic potential determined by the inhomogeneous distribution of the phase difference of the order parameter along the junction. Starting from the quasiclassical version of the Bogoliubov–de Gennes theory, we found the quasiparticle spectrum and the local density of states (DOS) both for the isolated Josephson vortex and the vortex chain. The spatially resolved DOS reveals a peculiar two-peak structure for each Josephson vortex, which can be detected experimentally using scanning tunneling microscopy and spectroscopy techniques.
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