Electric polarization evolution equation for antiferromagnetic multiferroics with the polarization proportional to the scalar product of the spins

Авторы: Andreev Pavel, Trukhanova Mariya Iv
Журнал: Physica Scripta
Том: 99
Номер: 10
Год издания: 2024
Издательство: Royal Swedish Academy of Sciences
Местоположение издательства: Sweden
Первая страница: 1059b2
DOI: 10.1088/1402-4896/ad7a35
Аннотация: The spin current model of electric polarization in multiferroics is justified via the quantum hydrodynamic method and the mean-field part of the spin-orbit interaction. The spin current model is applied to derive the electric polarization proportional to the scalar product of the spins of the nearby ions, which appears to be caused by the Dzylaoshinskii-Moriya interaction. The symmetric tensor spin structure of the polarization is discussed as well. We start our derivations for the ferromagnetic multiferroic materials and present further generalizations for the antiferromagnetic multiferroic materials. We rederive the operator of the electric dipole moment, which provides the macroscopic polarization obtained via the spin current model. Finally, we use the quantum average of the found electric dipole moment operator to derive the polarization evolution equation for the antiferromagnetic multiferroic materials. The possibility of spiral spin structures is analyzed.
Добавил в систему: Труханова Мария Ивановна

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