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Article Dans Une Revue Physical Review B: Condensed Matter and Materials Physics (1998-2015) Année : 2003

Superconducting fluctuations in the Luther-Emery liquid

Résumé

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.

Dates et versions

hal-00019094 , version 1 (15-02-2006)

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Edmond Orignac, Didier Poilblanc. Superconducting fluctuations in the Luther-Emery liquid. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2003, 68, pp.052504. ⟨10.1103/PhysRevB.68.052504⟩. ⟨hal-00019094⟩
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