Тип публикации: статья из журнала
Год издания: 2022
Идентификатор DOI: 10.1134/s0021364022100575
Аннотация: An unconventional temperature dependence of infrared absorption spectra of rare-earth cobalt oxides LaCoO3 and GdCoO3 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 anhaПоказать полностьюrmonicity. It has been shown that the redshift of the phonon spectrum is due to the e-lectron–phonon coupling quadratic in the lattice displacement and to fluctuations of the multiplicity of Co3+ ions.
Журнал: JETP Letters
Выпуск журнала: Т.115, №10
Номера страниц: 615-619
ISSN журнала: 00213640
Место издания: Москва
Издатель: Pleiades Publishing, Ltd. (Плеадес Паблишинг, Лтд)