Ginzburg Landau theory for d-wave pairing and fourfold symmetric vortex core structure

Abstract

The Ginzburg Landau theory for d_{x^2-y^2}-wave superconductors is constructed, by starting from the Gor'kov equation with including correction terms up to the next order of ln(T_c/T). Some of the non-local correction terms are found to break the cylindrical symmetry and lead to the fourfold symmetric core structure, reflecting the internal degree of freedom in the pair potential. Using this extended Ginzburg Landau theory, we investigate the fourfold symmetric structure of the pair potential, current and magnetic field around an isolated single vortex, and clarify concretely how the vortex core structure deviates from the cylindrical symmetry in the d_{x^2-y^2}-wave superconductors.

arXiv comment12 pages including 8 eps figs, LaTeX with jpsj.sty & epsfig

References in corpus (3)

• GINZBURG-LANDAU THEORY OF VORTICES IN $d$-WAVE SUPERCONDUCTORS
• Vortex structure in $d$-wave superconductors
• $s$- and $d_{xy}$-wave components induced around a vortex in $d_{x^2-y^2}$-wave superconductors

Cited by in corpus (6)

• Field dependence of the vortex structure in d-wave and s-wave superconductors
• Effects of gap anisotropy upon the electronic structure around a superconducting vortex
• Novel vortex lattice transition in d-wave superconductors
• On the interpretation of muon-spin-rotation experiments in the mixed state of type-II superconductors
• Vortex lattice structure in a d_{x^2-y^2}-wave superconductor
• Ginzburg-Landau calculations of d-wave superconducting dot in s-wave superconducting matrix