Quasiparticle spectra in the vicinity of a d-wave vortex

Details Quasiparticle spectra in the vicinity of a d-wave vortex Quasiparticle spectra in the vicinity of a d-wave vortex

1998-12-08

arxiv.org/abs/cond-mat/9812126v1

PRB 60, 3581 (1999).

Physics

Condensed Matter

Superconductivity

9 pages REVTeX + 5 PostScript figures. For related work and info visit http://www.pha.jhu.edu/~franz

Scientific paper

10.1103/PhysRevB.60.3581

We discuss the evolution of the local quasiparticle spectral density and the related tunneling conductance measurable by the scanning tunneling microscope, as a function of distance r and angle \theta from the vortex core in a d_{x^2-y^2} superconductor. We consider the effects of electronic disorder and of a strongly anisotropic tunneling matrix element, and show that in real materials they will likely obscure the ~1/r asymptotic tail in the zero-bias tunneling conductance expected from the straightforward semiclassical analysis. We also give a prediction for the tunneling conductance anisotropy around the vortex core and establish a connection to the structure of the tunneling matrix element.

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