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Exchange interactioninLaCoO-=SUB=-3-=/SUB=-between cobalt ionsCo-=SUP=-3+-=/SUP=-in different spinstates Polukeev S. I.Gavrichkov V. A.Ovchinnikov S. G.2022 год

Exchange interaction in LaCoO-=SUB=-3-=/SUB=- between cobalt ions Co-=SUP=-3+-=/SUP=- in different spin states : научное издание
статья из журнала

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Библиографическое описание: Exchange interaction in LaCoO-=SUB=-3-=/SUB=- between cobalt ions Co-=SUP=-3+-=/SUP=- in different spin states : научное издание / Polukeev S. I., Gavrichkov V. A., Ovchinnikov S. G. - Текст : непосредственный // Physics of the Solid State. - 2022. - Т. 64, № 12. - P. 1887. - ISSN 1063-7834. - ISSN 1090-6460, DOI 10.21883/pss.2022.12.54381.426.
Аннотация: <jats:p> The values and signs of the contributions to the superexchange interaction of Co<jats:sup>3+</jats:sup> ions in LaCoO<jats:sub>3</jats:sub> in different spin states, namely, the superexchange of a pair of ions in the intermediate (IS) state and the superexchange of a pair of ions, one of which is in the intermediate state and the other in the high-spin (HS) state, are studied. For this purpose, virtual electron-hole pairs produced in the course of superexchange (the so-called exchange loops) have been studied within the framework of a multiband generalization of the Hubbard model. It is shown that the cobalt ions in the intermediate state are ordered ferromagnetically, while a pair of ions in different HS and IS states makes an AFM contribution to the superexchange. Keywords: superexchange interaction, magnetic structure, Hubbard model, projection operator method, exchange loop. </jats:p>
Год издания: 2022
Авторы: Polukeev S. I. , Gavrichkov V. A. , Ovchinnikov S. G.
Издательство: Ioffe Institute Russian Academy of Sciences
Источник: Physics of the Solid State
Выпуск: Т. 64, № 12
Номера страниц: 1887
Держатель оригинала документа: Kirensky Institute of Physics, Federal Research Center KSC SB, Russian Academy of Sciences, Krasnoyarsk, Russia
Количество экземпляров:
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