Pseudogap effects induced by resonant pair scattering

Details Pseudogap effects induced by resonant pair scattering Pseudogap effects induced by resonant pair scattering

1997-05-15

arxiv.org/abs/cond-mat/9705144v1

Physics

Condensed Matter

Superconductivity

REVTeX3.0; 4 pages, 4 EPS figures (included)

Scientific paper

10.1103/PhysRevB.56.R11407

We demonstrate how resonant pair scattering of correlated electrons above T_c can give rise to pseudogap behavior. This resonance in the scattering T-matrix appears for superconducting interactions of intermediate strength, within the framework of a simple fermionic model. It is associated with a splitting of the single peak in the spectral function into a pair of peaks separated by an energy gap. Our physical picture is contrasted with that derived from other T-matrix schemes, with superconducting fluctuation effects, and with preformed pair (boson-fermion) models. Implications for photoemission and tunneling experiments in the cuprates are discussed.

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