Phonon density of states and lattice specific heat in Sr2RuO4 Original Research Article

We present the phonon density of states and lattice contribution to specific heat in the superconducting compound Sr2RuO4 by using an unscreened rigid ion model for the first time. We also present the partial phonon density of states for different species of this compound to bring out the details of the participation of different atoms in the total phonon density of states. The results obtained in the present study show the general features of the phonon spectrum. We could not compare our results with the experimental measurements as they are not available so far. We emphasize the need of neutron scattering measurements to compare our results.