2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/21065We have studied the temperature dependence of the optical spectra for the CDW gap and optical phonons in a single crystal of BaBiO_3 and a film deposited by laser ablation. The integrated optical conductivity for optical phonons decreases rapidly with increasing temperature above 150 K, while the single-particle excitation across the CDW gap remains constant.3 pages, 5 figures, ISS'94Superconductivitytext