Phys. Rev. B 56, 7789–7792 (1997)Vertex corrections in antiferromagnetic spin-fluctuation theoriesReceived 21 January 1997; published in the issue dated 1 October 1997 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. © 1997 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.56.7789
DOI:
10.1103/PhysRevB.56.7789
PACS:
75.10.Jm
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