We address the issue whether the data on optical conductivity and Raman scattering in electron-doped cuprates below Tc support the idea that the d−wave gap in these materials is non-monotonic along the Fermi surface. We calculate the conductivity and Raman intensity for elastic scattering, and find that a non-monotonic gap gives rise to several specific features in optical and Raman response functions. We argue that all these features are present in the experimental data on Nd2−xCexCuO4 and Pr2−xCexCuO4 compounds.
@article{arxiv.0709.4146,
title = {Signatures of non-monotonic d-wave gap in electron-doped cuprates},
author = {Ilya Eremin and Evelina Tsoncheva and Andrey V. Chubukov},
journal= {arXiv preprint arXiv:0709.4146},
year = {2009}
}