Superconducting fluctuations in the Luther-Emery liquid

Details Superconducting fluctuations in the Luther-Emery liquid Superconducting fluctuations in the Luther-Emery liquid

2003-03-04

arxiv.org/abs/cond-mat/0303053v1

Phys. Rev. B 68, 052504 (2003)

Physics

Condensed Matter

Strongly Correlated Electrons

RevTeX 4, 3 pages, 2 EPS figures

Scientific paper

10.1103/PhysRevB.68.052504

The single-particle superconducting Green's functions of a Luther-Emery liquid is computed by bosonization techniques. Using a formulation introduced by Poilblanc and Scalapino [Phys. Rev. B v. 66, art. 052513 (2002)], an asymptotic expression of the superconducting gap is deduced in the long wavelength and small frequency limit. Due to superconducting phase fluctuations, the gap exhibits as a function of size L a (1/L)^{1/2K_\rho} power-law decay as well as an interesting singularity at the spectral gap energy. Similarities and differences with the 2-leg t-J ladder are outlined.

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