Nodal quasiparticles and classical phase fluctuations in d-wave superconductors

Details Nodal quasiparticles and classical phase fluctuations in d-wave superconductors Nodal quasiparticles and classical phase fluctuations in d-wave superconductors

2003-08-12

arxiv.org/abs/cond-mat/0308229v1

Phys. Rev. Lett. 92, 057002 (2004)

Physics

Condensed Matter

Superconductivity

4 pages

Scientific paper

10.1103/PhysRevLett.92.057002

We show that the nodal quasiparticles have significant effect on the classical phase fluctuations in a quasi-two-dimensional d-wave superconductor. They give rise to singularities in the temperature behavior of some of the coupling constants in the phase-only effective action. One of the consequences is that the classical XY-model is not adequate for the description of the superconducting fluctuations in d-wave superconductors at low temperatures.

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