Calculations of the pairing interaction in multi-band models of the Fe superconductors show that it is attractive in both the A1g (s-wave) and B1g (d-wave) channels. This raises the possibility that these materials may have collective excitonic modes. Here, assuming an s-wave groundstate, we investigate the d-wave collective excitonic mode and its coupling to the Raman scattering.
Cite
@article{arxiv.0904.1973,
title = {Collective $d-$wave Excitonic Modes in the Fe-Superconductors},
author = {D. J. Scalapino and T. P. Devereaux},
journal= {arXiv preprint arXiv:0904.1973},
year = {2010}
}