Year: 2001
Type: preprint
Abstract: Motivated by the recent optical and photoemission measurements on half-metallic ferromagnetic three-dimensional manganites, we combine a tight-binding fit of the one-particle bandstructure with the dynamical mean-field theory, which treats the dynamical orbital correlations and the combination of Jahn-Teller and doping-induced disorder on the same footing. We show how all of the above effects are necessary to obtain good semiquantitative agreement with experimental features. As applications, we show how modest external magnetic fields drive drastic changes in the optical spectrum, demonstrating the {\it colossal ac magnetoconductivity}. The photoemission lineshape contribution is evaluated, and good agreement with published experimental work is found.
Source: arXiv (Cornell University)
Authors: Craco, L., Laad, M. S., Müller-Hartmann, E.
Language: English
Field: Materials Science
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W1802254675