Nesting symmetries and diffusion in disordered d-wave superconductors
Condensed Matter
2009-11-07 v2
Abstract
The low-energy density of states (DOS) of disordered 2D d-wave superconductors is extremely sensitive to details of both the disorder model and the electronic band structure. Using diagrammatic methods and numerical solutions of the Bogoliubov-de Gennes equations, we show that the physical origin of this sensitivity is the existence of a novel diffusive mode with momentum close to which is gapless only in systems with a global nesting symmetry. We find that in generic situations, the DOS vanishes at the Fermi level. However, proximity to the highly symmetric case may nevertheless lead to observable non-monotonic behavior of the DOS in the cuprates.
Cite
@article{arxiv.cond-mat/0102310,
title = {Nesting symmetries and diffusion in disordered d-wave superconductors},
author = {A. G. Yashenkin and W. A. Atkinson and I. V. Gornyi and P. J. Hirschfeld and D. V. Khveshchenko},
journal= {arXiv preprint arXiv:cond-mat/0102310},
year = {2009}
}