Polaronic effect in the x-ray absorption spectra of La1-xCaxMnO3 manganites

S. W. Huang, Y. T. Liu, J. M. Lee, J. M. Chen, J. F. Lee, R. W. Schoenlein, Y. D. Chuang, J. Y. Lin

研究成果: Article同行評審

2 引文 斯高帕斯(Scopus)

摘要

X-ray absorption spectroscopy (XAS) is performed to study changes in the electronic structures of colossal magnetoresistance (CMR) and charged ordered (CO) La1-xCaxMnO3 manganites with respect to temperature. The pre-edge features in O and Mn K-edge XAS spectra, which are highly sensitive to the local distortion of MnO6 octahedral, exhibit contrasting temperature dependence between CMR and CO samples. The seemingly counter-intuitive XAS temperature dependence can be reconciled in the context of polarons. These results help identify the most relevant orbital states associated with polarons and highlight the crucial role played by polarons in understanding the electronic structures of manganites.

原文English
文章編號195601
期刊Journal of Physics Condensed Matter
31
發行號19
DOIs
出版狀態Published - 1 1月 2019

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