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Updated: Aug 24, 2026

Advanced Experimental Methods for Low-temperature Magnetotransport Measurement of Novel Materials
Published on: January 21, 2016
Direct observation of high-temperature polaronic behavior in colossal magnetoresistive manganites
N Mannella1, A Rosenhahn, C H Booth
1Department of Physics, UC Davis, Davis, California 95616, USA. norman@electron.lbl.gov
Abstract:
The temperature dependence of the electronic and atomic structure of the colossal magnetoresistive oxides La1-xSrxMnO3 (x=0.3, 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.
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