Collective d-wave Excitonic Modes in the Fe-Superconductors
Abstract
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.
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