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

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift

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.

Detaljer

Författare
  • S. W. Huang
  • Y. T. Liu
  • J. M. Lee
  • J. M. Chen
  • J. F. Lee
  • R. W. Schoenlein
  • Y. D. Chuang
  • J. Y. Lin
Enheter & grupper
Externa organisationer
  • Lawrence Berkeley National Laboratory
  • National Chiao Tung University
  • National Synchrotron Radiation Research Center
  • SLAC National Accelerator Laboratory
Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Den kondenserade materiens fysik
Originalspråkengelska
Artikelnummer195601
TidskriftJournal of physics. Condensed matter : an Institute of Physics journal
Volym31
Utgåva nummer19
StatusPublished - 2019
PublikationskategoriForskning
Peer review utfördJa