Fermi liquid interactions and the superfluid density in d-wave superconductors

Details Fermi liquid interactions and the superfluid density in d-wave superconductors Fermi liquid interactions and the superfluid density in d-wave superconductors

2002-07-23

arxiv.org/abs/cond-mat/0207562v1

Phys. Rev. B 66, 214517 (2002)

Physics

Condensed Matter

Superconductivity

5 latex pages, 1 eps-figure. submitted to PRB

Scientific paper

10.1103/PhysRevB.66.214517

We construct a phenomenological superfluid Fermi liquid theory for a two-dimensional d-wave superconductor on a square lattice, and study the effect of quasiparticle interactions on the superfluid density. Using simple models for the dispersion and the Landau interaction function, we illustrate the deviation of these results from those for the isotropic superfluid. This allows us to reconcile the value and doping dependence of the superfluid density slope at low temperature obtained from penetration depth measurements, with photoemission data on nodal quasiparticles.

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