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

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Détails bibliographiques
Auteurs principaux:	Andreev, Pavel A., Trukhanova, Mariya Iv.
Format:	Preprint
Publié:	2024
Sujets:	Materials Science Statistical Mechanics
Accès en ligne:	Acceder al recurso
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_version_	1866916385403174912
author	Andreev, Pavel A. Trukhanova, Mariya Iv.
author_facet	Andreev, Pavel A. Trukhanova, Mariya Iv.
contents	The spin current model of electric polarization of 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 near by ions, which appears to be caused by the Dzylaoshinskii-Moriya interaction. Symmetric tensor spin structure of the polarization is discussed as well. We start our derivations for the ferromagnetic multiferroic materials and present the further generalization 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 in order to derive the polarization evolution equation for the antiferromagnetic multiferroic materials. Possibility of spiral spin structures is analyzed.
format	Preprint
id	arxiv_https___arxiv_org_abs_2403_01211
institution	arXiv
publishDate	2024
record_format	arxiv
spellingShingle	Electric polarization evolution equation for antiferromagnetic multiferroics with the polarization proportional to the scalar product of the spins Andreev, Pavel A. Trukhanova, Mariya Iv. Materials Science Statistical Mechanics The spin current model of electric polarization of 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 near by ions, which appears to be caused by the Dzylaoshinskii-Moriya interaction. Symmetric tensor spin structure of the polarization is discussed as well. We start our derivations for the ferromagnetic multiferroic materials and present the further generalization 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 in order to derive the polarization evolution equation for the antiferromagnetic multiferroic materials. Possibility of spiral spin structures is analyzed.
title	Electric polarization evolution equation for antiferromagnetic multiferroics with the polarization proportional to the scalar product of the spins
topic	Materials Science Statistical Mechanics
url	https://arxiv.org/abs/2403.01211

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