Abstract
The temperature dependence of the electronic and atomic structure of the colossal magnetoresistive oxides (, 0.4) has been studied using core and valence level photoemission, x-ray absorption and emission, and extended x-ray absorption fine structure spectroscopy. A dramatic and reversible change of the electronic structure is observed on crossing the Curie temperature, including charge localization on and spin-moment increase of Mn, together with Jahn-Teller distortions, both signatures of polaron formation. Our data are also consistent with a phase-separation scenario.
- Received 19 July 2003
DOI:https://doi.org/10.1103/PhysRevLett.92.166401
©2004 American Physical Society