Gaussian fluctuation corrections to the BCS mean field gap amplitude at zero temperature
Strongly Correlated Electrons
2007-05-23 v3 Superconductivity
Abstract
The leading (Gaussian) fluctuation correction to the weak coupling zero temperature BCS superconducting gap equation is computed. We find that the dominant contribution comes from the high energies and momenta (compared to the gap) and gives a correction smaller by the weak-coupling factor than the mean-field terms. This correction is small due to cancellation of singular contributions from the amplitude and phase mode at high energies and momenta.
Cite
@article{arxiv.cond-mat/0207190,
title = {Gaussian fluctuation corrections to the BCS mean field gap amplitude at zero temperature},
author = {S. Kos and A. J. Millis and A. I. Larkin},
journal= {arXiv preprint arXiv:cond-mat/0207190},
year = {2007}
}
Comments
New author added. Incorrect calculations of previous version corrected and conclusions revised Rev 2: New references added, minor misprints corrected