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Title: Temperature dependence of the electronic transitions in BiFeO{sub 3} thin film studied by spectroscopic ellipsometry

Abstract

The temperature dependence of the electronic response of BiFeO{sub 3} thin film grown on a SrTiO{sub 3} substrate is investigated using spectroscopic ellipsometry. By analyzing the pseudodielectric function, we identify two d-d crystal field transitions of Fe{sup 3+} ions in the energy region between 1 and 2 eV. The d-d transitions show abnormal temperature dependence that cannot be attributed to conventional electron-phonon interactions. The origin of the abnormal temperature dependence is discussed in terms of spin-charge coupling. The temperature dependence of the charge transfer transitions located above 2.5 eV is characterized by standard critical point model analysis of the 2nd derivatives of the dielectric function. This analysis provides detailed information of the critical point parameters for charge transfer transitions.

Authors:
;  [1]
  1. Center for Correlated Electron Systems, Institute for Basic Science, Seoul 151-742 (Korea, Republic of)
Publication Date:
OSTI Identifier:
22399389
Resource Type:
Journal Article
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 117; Journal Issue: 13; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0021-8979
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; BISMUTH COMPOUNDS; CRYSTAL FIELD; DIELECTRIC MATERIALS; ELECTRON-PHONON COUPLING; ELLIPSOMETRY; EV RANGE; IRON IONS; IRON OXIDES; PERMITTIVITY; SPIN; STRONTIUM TITANATES; SUBSTRATES; TEMPERATURE DEPENDENCE; THIN FILMS

Citation Formats

Kang, T. D., Jeon, B. C., Department of Physics and Astronomy, Seoul National University, Seoul 151-742, and Moon, S. J., E-mail: soonjmoon@hanyang.ac.kr. Temperature dependence of the electronic transitions in BiFeO{sub 3} thin film studied by spectroscopic ellipsometry. United States: N. p., 2015. Web. doi:10.1063/1.4916722.
Kang, T. D., Jeon, B. C., Department of Physics and Astronomy, Seoul National University, Seoul 151-742, & Moon, S. J., E-mail: soonjmoon@hanyang.ac.kr. Temperature dependence of the electronic transitions in BiFeO{sub 3} thin film studied by spectroscopic ellipsometry. United States. https://doi.org/10.1063/1.4916722
Kang, T. D., Jeon, B. C., Department of Physics and Astronomy, Seoul National University, Seoul 151-742, and Moon, S. J., E-mail: soonjmoon@hanyang.ac.kr. 2015. "Temperature dependence of the electronic transitions in BiFeO{sub 3} thin film studied by spectroscopic ellipsometry". United States. https://doi.org/10.1063/1.4916722.
@article{osti_22399389,
title = {Temperature dependence of the electronic transitions in BiFeO{sub 3} thin film studied by spectroscopic ellipsometry},
author = {Kang, T. D. and Jeon, B. C. and Department of Physics and Astronomy, Seoul National University, Seoul 151-742 and Moon, S. J., E-mail: soonjmoon@hanyang.ac.kr},
abstractNote = {The temperature dependence of the electronic response of BiFeO{sub 3} thin film grown on a SrTiO{sub 3} substrate is investigated using spectroscopic ellipsometry. By analyzing the pseudodielectric function, we identify two d-d crystal field transitions of Fe{sup 3+} ions in the energy region between 1 and 2 eV. The d-d transitions show abnormal temperature dependence that cannot be attributed to conventional electron-phonon interactions. The origin of the abnormal temperature dependence is discussed in terms of spin-charge coupling. The temperature dependence of the charge transfer transitions located above 2.5 eV is characterized by standard critical point model analysis of the 2nd derivatives of the dielectric function. This analysis provides detailed information of the critical point parameters for charge transfer transitions.},
doi = {10.1063/1.4916722},
url = {https://www.osti.gov/biblio/22399389}, journal = {Journal of Applied Physics},
issn = {0021-8979},
number = 13,
volume = 117,
place = {United States},
year = {Tue Apr 07 00:00:00 EDT 2015},
month = {Tue Apr 07 00:00:00 EDT 2015}
}