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Pis'ma v Zhurnal Èksperimental'noi i Teoreticheskoi Fiziki, 2022, Volume 115, Issue 10, Pages 650–655
DOI: https://doi.org/10.31857/S1234567822100081
(Mi jetpl6675)
 

This article is cited in 2 scientific papers (total in 2 papers)

CONDENSED MATTER

Fluctuations of the multiplicity of Co$^{3+}$ ions and softening of the phonon spectrum of rare-earth cobalt oxides

Yu. S. Orlovab, V. A. Dudnikova, A. E. Sokolovba, T. M. Ovchinnikovac, N. P. Shestakova, S. G. Ovchinnikovab

a Kirensky Institute of Physics, Federal Research Center KSC, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036 Russia
b Siberian Federal University, Krasnoyarsk, 660041 Russia
c Sukachev Institute of Forest, Federal Research Center KSC, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036 Russia
References:
Abstract: An unconventional temperature dependence of infrared absorption spectra of rare-earth cobalt oxides LaCoO$_3$ and GdCoO$_3$ has been studied experimentally and theoretically in the temperature range of 3.2–550 K. A quite strong softening of the optical phonon mode has been detected, which cannot be explained by standard lattice anharmonicity. It has been shown that the redshift of the phonon spectrum is due to the electron–phonon coupling quadratic in the lattice displacement and to fluctuations of the multiplicity of Co$^{3+}$ ions.
Funding agency Grant number
Russian Science Foundation 18-12-00022
This work was supported by the Russian Science Foundation (project no. 18-12-00022).
Received: 10.04.2022
Revised: 10.04.2022
Accepted: 11.04.2022
English version:
Journal of Experimental and Theoretical Physics Letters, 2022, Volume 115, Issue 10, Pages 615–619
DOI: https://doi.org/10.1134/S0021364022100575
Bibliographic databases:
Document Type: Article
Language: Russian
Citation: Yu. S. Orlov, V. A. Dudnikov, A. E. Sokolov, T. M. Ovchinnikova, N. P. Shestakov, S. G. Ovchinnikov, “Fluctuations of the multiplicity of Co$^{3+}$ ions and softening of the phonon spectrum of rare-earth cobalt oxides”, Pis'ma v Zh. Èksper. Teoret. Fiz., 115:10 (2022), 650–655; JETP Letters, 115:10 (2022), 615–619
Citation in format AMSBIB
\Bibitem{OrlDudSok22}
\by Yu.~S.~Orlov, V.~A.~Dudnikov, A.~E.~Sokolov, T.~M.~Ovchinnikova, N.~P.~Shestakov, S.~G.~Ovchinnikov
\paper Fluctuations of the multiplicity of Co$^{3+}$ ions and softening of the phonon spectrum of rare-earth cobalt oxides
\jour Pis'ma v Zh. \`Eksper. Teoret. Fiz.
\yr 2022
\vol 115
\issue 10
\pages 650--655
\mathnet{http://mi.mathnet.ru/jetpl6675}
\crossref{https://doi.org/10.31857/S1234567822100081}
\edn{https://elibrary.ru/dyvfqp}
\transl
\jour JETP Letters
\yr 2022
\vol 115
\issue 10
\pages 615--619
\crossref{https://doi.org/10.1134/S0021364022100575}
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  • https://www.mathnet.ru/eng/jetpl/v115/i10/p650
  • This publication is cited in the following 2 articles:
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    Письма в Журнал экспериментальной и теоретической физики Pis'ma v Zhurnal Иksperimental'noi i Teoreticheskoi Fiziki
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    References:21
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