Superconductive Phonon Anomalies in High-$T_c$ Cuprates
Abstract
We consider the effects on phonon dynamics of spin-lattice coupling within the slave-boson mean-field treatment of the extended - model. With no additional assumptions the theory is found to give a semi-quantitative account of the frequency and linewidth anomalies observed by Raman and neutron scattering for the 340 phonon mode in at the superconducting transition. We discuss the applicability of the model to phonon modes of different symmetries, and report a connection to spin-gap features observed in underdoped YBCO. The results suggest the possibility of a unified understanding of the anomalies in transport, magnetic and lattice properties.
Keywords
Cite
@article{arxiv.cond-mat/9408069,
title = {Superconductive Phonon Anomalies in High-$T_c$ Cuprates},
author = {B. Normand and H. Kohno and H. Fukuyama},
journal= {arXiv preprint arXiv:cond-mat/9408069},
year = {2009}
}
Comments
heavily revised version of previous paper, including systematic treatment of effect of $t$ term, coupling constant derivation and calculation of phonon linewidth broadening. Revised Figs. 3 and 4 still only available by sending fax # to [email protected]