We clarify the physical origin of the discrepancy between recent purely perturbative and self-consistent calculations of the vertex correction in the spin-fermion model for cuprates. We argue that perturbative calculations substantially overestimate the strength of the vertex corrections at moderate couplings.
|Original language||English (US)|
|Number of pages||4|
|Journal||Physical Review B - Condensed Matter and Materials Physics|
|State||Published - 1997|