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Polaronic effect in the x-ray absorption spectra of La 1-x Ca x MnO 3 manganites

Huang, S. W. LU ; Liu, Y. T.; Lee, J. M. LU ; Chen, J. M.; Lee, J. F.; Schoenlein, R. W.; Chuang, Y. D. and Lin, J. Y. (2019) In Journal of physics. Condensed matter : an Institute of Physics journal 31(19).
Abstract

X-ray absorption spectroscopy (XAS) is performed to study changes in the electronic structures of colossal magnetoresistance (CMR) and charged ordered (CO) La1-x Ca x MnO3 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.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of physics. Condensed matter : an Institute of Physics journal
volume
31
issue
19
publisher
IOP Publishing
external identifiers
  • scopus:85062986160
ISSN
1361-648X
DOI
10.1088/1361-648X/ab05a2
language
English
LU publication?
yes
id
c0d7dbb6-f5fd-4095-80b3-d84167e5dd1d
date added to LUP
2019-03-27 13:01:35
date last changed
2019-04-23 04:47:27
@article{c0d7dbb6-f5fd-4095-80b3-d84167e5dd1d,
  abstract     = {<p>X-ray absorption spectroscopy (XAS) is performed to study changes in the electronic structures of colossal magnetoresistance (CMR) and charged ordered (CO) La1-x Ca x MnO3 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.</p>},
  articleno    = {195601},
  author       = {Huang, S. W. and Liu, Y. T. and Lee, J. M. and Chen, J. M. and Lee, J. F. and Schoenlein, R. W. and Chuang, Y. D. and Lin, J. Y.},
  issn         = {1361-648X},
  language     = {eng},
  number       = {19},
  publisher    = {IOP Publishing},
  series       = {Journal of physics. Condensed matter : an Institute of Physics journal},
  title        = {Polaronic effect in the x-ray absorption spectra of La                         
                        <sub>1-x</sub>
                                                  Ca                          
                        <sub>x</sub>
                                                  MnO                         
                        <sub>3</sub>
                                                  manganites},
  url          = {http://dx.doi.org/10.1088/1361-648X/ab05a2},
  volume       = {31},
  year         = {2019},
}