Fundamental properties of a vortex in a d-wave superconductor

Details Fundamental properties of a vortex in a d-wave superconductor Fundamental properties of a vortex in a d-wave superconductor

1995-07-11

arxiv.org/abs/cond-mat/9507027v1

J. Phys. Soc. Jpn. 64, 4547 (1995)

Physics

Condensed Matter

11 pages, latex, 4 PostScript figures

Scientific paper

10.1143/JPSJ.64.4547

The vortex core structure in a d-wave superconductor is analyzed on the basis of the quasi-classical Eilenberger theory beyond the Ginzburg-Landau framework. The current and magnetic field distributions around an isolated vortex break circular symmetry seen in s-wave pairing and show four-fold symmetry, reflecting the internal degrees of freedom in d-wave pairing, {\it i.e.} $\hat k_x^2-\hat k_y^2$ in reciprocal space through the low lying quasi-particle excitations. The peculiar orientation of the flux line lattice observed recently in a cuprate is argued in light of the present theory.

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