Abstract
We calculate one-particle spectrum A ( k ,ω) in the presence of strong d-wave attractive interaction. We use the self-consistent T-matrix approximation and get anomalous behavior of the spectrum at low temperatures. The anomaly is characterized by a three-peak structure of the spectrum A ( k =(π,0),ω) . We also compare our result with that obtained by the angle resolved photoemission spectroscopy and discuss the essential nature of the pseudogap.
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