2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/28979A tight binding parameterization of the band structure, along with a mean field treatment of Hund, electron-electron, and electron-lattice couplings, is used to obtain the full optical conductivity tensor of LaMnO_3 as a function of temperature. We predict striking changes with temperature in the functional form and magnitude of the optical absorption. Comparison of our results to data will determine the Hund, electron-lattice, and electron-electron interactions.24 pages text(RevTex file) and 10 figures(ps file), submitted to Phys. Rev. B (1 new chapter, 4 new figures added with new calculations)Strongly Correlated ElectronsMaterials Sciencetext