Angular band structure of a vortex line in a type-II superconductor
François Gygi, Michael Schluter
DOI 10.1103/PhysRevLett.65.1820 · Physical Review Letters
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Abstract
The electronic structure of a vortex line in a type-II superconductor is calculated in the low-magnetic-field limit in the framework of the Bogoliubov–de Gennes theory. It is found that breaking the rotational invariance of a vortex line by means of either an anisotropic crystal potential or by the presence of neighboring vortices induces an angular band structure in the low-energy part of the quasiparticle spectrum. The associated quasiparticle amplitudes become distorted and exhibit a characteristic ‘‘star’’ shape whose orientation is energy dependent. This explains recent scanning-tunneling-microscopy experiments by Hess, Robinson, and Waszczak [Phys. Rev. Lett. 64, 2711 (1990)] on NbSe2.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| NbSe2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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