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cond-mat.str-el1998
The Small Polaron Crossover: Role of Dimensionality
M. Capone, S. Ciuchi, C. Grimaldi
The crossover from quasi free electron to small polaron in the Holstein model for a single electron is studied by means of both exact and self-consistent calculations in one dimens…
cond-mat.supr-con1998
Role of the superconducting gap opening on vertex corrections
E. Cappelluti, C. Grimaldi, L. Pietronero
The nonadiabatic effects due to the breakdown of Migdal's theorem in high- superconductors are strongly affected by the opening of the superconducting gap. Here we report how…