Local density of states in the vortex lattice in a type II superconductor

Details Local density of states in the vortex lattice in a type II superconductor Local density of states in the vortex lattice in a type II superconductor

1996-11-21

arxiv.org/abs/cond-mat/9611157v1

Phys. Rev. B 55, 6565 (1997).

Physics

Condensed Matter

Superconductivity

10 pages, RevTex, 32 figures

Scientific paper

10.1103/PhysRevB.55.6565

Local density of states (LDOS) in the triangular vortex lattice is investigated based on the quasi-classical Eilenberger theory. We consider the case of an isotropic s-wave superconductor with the material parameter appropriate to NbSe_2. At a weak magnetic field, the spatial variation of the LDOS shows cylindrical structure around a vortex core. On the other hand, at a high field where the core regions substantially overlap each other, the LDOS is sixfold star-shaped structure due to the vortex lattice effect. The orientation of the star coincides with the experimental data of the scanning tunneling microscopy. That is, the ray of the star extends toward the nearest-neighbor (next nearest-neighbor) vortex direction at higher (lower) energy.

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