COMMENT: Comment on `Boson-fermion model beyond the mean-field approximation'
Abstract
In a recent paper, it has been suggested that there is no Cooper pairing in boson-fermion models of superconductivity. This result is based on an inconsistent approximation which violates an exact identity. Quite generally, the divergence of the fermion t-matrix (the Thouless criterion) is accompanied by the condensation of a boson mode.
- Publication:
-
Journal of Physics Condensed Matter
- Pub Date:
- April 1998
- DOI:
- 10.1088/0953-8984/10/13/024
- arXiv:
- arXiv:cond-mat/9705089
- Bibcode:
- 1998JPCM...10.3089F
- Keywords:
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- Condensed Matter - Superconductivity
- E-Print:
- LaTeX, 5 pages, 2style files included, 4 embedded EPS figures, submitted to J.Phys.:Condens.Matter