%0 Journal Article
%T Temperature dependent scattering rate and optical mass of ferromagnetic metallic manganites
%A J. R. Simpson
%A H. D. Drew
%A V. N. Smolyaninova
%A R. L. Greene
%A M. C. Robson
%A Amlan Biswas
%A M. Rajeswari
%J Physics
%D 1999
%I arXiv
%R 10.1103/PhysRevB.60.R16263
%X We report on the optical properties of the hole-doped manganites La_0.7Ca_0.3MnO_3 and La_0.7Ca_0.3MnO_3. Transmission and reflection of thin films are measured in the infrared at temperatures from 10 - 150 K using Fourier-transform spectroscopy. The scattering rate and optical mass are obtained by fitting the far-infrared transmission to a Drude model. The scattering rate shows a T^2 dependence with temperature. The optical mass enhancement differs only slightly from specific heat results. In addition, we compare the infrared spectral weight to band structure calculations [M. Quijada et al., Phys. Rev. B 58, 16093 (1998)].
%U http://arxiv.org/abs/cond-mat/9908419v1