Classical phase fluctuations in d-wave superconductors
arXiv:cond-mat/0510545 · doi:10.1142/S0217984905009067
Abstract
We study the effects of low-energy nodal quasiparticles on the classical phase fluctuations in a two-dimensional d-wave superconductor. The singularities of the phase-only action at T\to 0 are removed in the presence of disorder, which justifies using an extended classical XY-model to describe phase fluctuations at low temperatures.
14 pages, brief review for Mod. Phys. Lett. B