Classical phase fluctuations in d-wave superconductors

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

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