Theory of optical conductivity in doped manganites

Thumbnail Image

Date

Authors

Journal Title

Journal ISSN

Volume Title

Publisher

Abstract

Description

The frequency and temperature dependence of the optical conductivity of ferromagnetic manganites is explained within the framework of the bipolaron theory. As these materials are cooled below the Curie temperature, the colossal magnetoressitance (CMR) is accompanied by a massive transfer of the spectral weight of the optical conductivity to lower frequencies. As with the CMR itself, this change in the optical conductivity is explained by the dissociation of bipolarons into small polarons by exchange interaction with the localized Mn spins during the transition to the low temperature ferromagnetic phase.
4 pages, REVTeX 3.0, four eps-figures included in the text. Minor typos corrected in text and figure 2 caption, references updated

Keywords

Strongly Correlated Electrons, Materials Science

Citation

URI

http://salesiana.dossiersoluciones.com/handle/123456789/29017

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/9901340
 http://arxiv.org/abs/cond-mat/9901340

Collections

arXiv