Quasiparticle spectrum near the gap node directions in the mixed state of dwave superconductors
Abstract
We report on a calculation of the quantized energy spectrum and quasiparticle eigenfunctions for low lying excitations in the mixed state of clean dwave superconductors. Our study is based on an approximate analytical solution of the Bogolubovde Gennes equations for both rectangular and triangular flux lattices with one of the primitive translations chosen parallel to the gap node direction. For excitations with momenta close to a certain gap node we have obtained a set of eigenfunctions which appear to be extended along the chosen gap node direction and localized along the perpendicular one on a scale determined by the intervortex distance. The periodic superfluid velocity field induces a band structure in the spectrum, which depends essentially on the vortex lattice geometry.
 Publication:

arXiv eprints
 Pub Date:
 June 1998
 DOI:
 10.48550/arXiv.condmat/9806188
 arXiv:
 arXiv:condmat/9806188
 Bibcode:
 1998cond.mat..6188M
 Keywords:

 Condensed Matter  Superconductivity
 EPrint:
 13 pages, revtex, 3 Postscript figures