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Issue 62, 2017, Issue in Progress
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First-principles study on the electronic, optical and thermodynamic properties of ABO3 (A = La,Sr, B = Fe,Co) perovskites

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Abstract

The electronic, optical and thermodynamic properties of ABO3 (A = La,Sr, B = Fe,Co) perovskites are investigated using first-principles calculations. The obtained results indicate that SrCoO3 and SrFeO3 are metals, while LaCoO3 and LaFeO3 are insulators and all of them exhibit strong hybridization of the Fe/Co-3d and O-2p orbitals. By correlating the energy band structures with the peaks of the imaginary part of the dielectric function, we obtained the origin of each electron excitation to provide information about the active bands for the corresponding optical transitions observed in the experiment. Moreover, the Debye temperatures θD obtained from the phonon frequencies are comparable to the available data. Finally, the thermodynamic properties of the Helmholtz free energy F, entropy S, and constant-volume heat capacity Cv are investigated based on the phonon spectra.

Graphical abstract: First-principles study on the electronic, optical and thermodynamic properties of ABO3 (A = La,Sr, B = Fe,Co) perovskites

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Publication details

The article was received on 12 Jun 2017, accepted on 19 Jul 2017 and first published on 08 Aug 2017


Article type: Paper
DOI: 10.1039/C7RA06542F
RSC Adv., 2017,7, 38798-38804
  • Open access: Creative Commons BY license
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    First-principles study on the electronic, optical and thermodynamic properties of ABO3 (A = La,Sr, B = Fe,Co) perovskites

    T. Jia, Z. Zeng, H. Q. Lin, Y. Duan and P. Ohodnicki, RSC Adv., 2017, 7, 38798
    DOI: 10.1039/C7RA06542F

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