%0 Journal Article
%T Electron-phonon coupling in DyFeO3 revealed by infrared spectroscopy
%A A. D. LaForge
%A J. Whalen
%A T. Siegrist
%A A. P. Ramirez
%A Z. Schlesinger
%J Physics
%D 2013
%I arXiv
%X We have investigated crystal field and phonon dynamics of the multiferroic orthoferrite DyFeO$_3$ via polarized infrared spectroscopy. Reflectance of single crystals was measured in the far- to mid-infrared spectral range at range of temperatures from 10-295 K. We observe a strongly anisotropic phonon spectrum which differs from earlier lattice dynamical calculations in its symmetry, as well as a mode with significant and unusual temperature dependence that we interpret as a coupled phonon-crystal-field excitation.
%U http://arxiv.org/abs/1302.2989v1