Pseudogap Phenomena in the BCS Pairing Model

Details Pseudogap Phenomena in the BCS Pairing Model Pseudogap Phenomena in the BCS Pairing Model

2002-01-22

arxiv.org/abs/cond-mat/0201380v2

Physics

Condensed Matter

Superconductivity

7 pages, 3 figures, references are added, to appear in J. Phys. Soc. Jpn. vol.71, no.5 (2002)

Scientific paper

10.1016/S0921-4534(02)02630-8

We investigate pseudo-gap phenomena realized in the BCS pairing model with a long but finite interaction range. We calculate the single-particle self-energy in all order exactly in the temperature range where the superconducting fluctuation propagator is Gaussian-like. It is found that vertex corrections to the self-energy which are discarded in the previous studies are crucially important for the pseudo-gap of the single-particle density of states in higher order calculations.

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