Effective theory of high-temperature superconductors

Details Effective theory of high-temperature superconductors Effective theory of high-temperature superconductors

2004-10-21

arxiv.org/abs/cond-mat/0410557v4

Phys.Rev.Lett. 94 (2005) 237001

Physics

Condensed Matter

Superconductivity

4 RevTex pages, 1 figure; few typos corrected; published version

Scientific paper

10.1103/PhysRevLett.94.237001

General field theory of a fluctuating d-wave superconductor is constructed and proposed as an effective description of superconducting cuprates at low energies. The theory is used to resolve a puzzle posed by recent experiments on superfluid density in severely underdoped YBCO. In particular, the overall temperature dependence of the superfluid density at low dopings is argued to be described well by the strongly anisotropic weakly interacting three-dimensional Bose gas, and thus approximately linear in temperature with an almost doping-independent slope.

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