1. Simple microscopic model for magneto-electric coupling in type-II antiferromagnetic multiferroics
- Author
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Pili, L., Borzi, R. A., Cabra, D. C., and Grigera, S. A.
- Subjects
Condensed Matter - Strongly Correlated Electrons ,Condensed Matter - Other Condensed Matter - Abstract
We present a simple two-dimensional model in which the lattice degrees of freedom mediate the interactions between magnetic moments and electric dipoles. This model reproduces basic features, such as a sudden electric polarization switch-off when a magnetic field is applied and the ubiquitous dimerized distortion patterns and magnetic $\uparrow \uparrow \downarrow \downarrow$ ordering, observed in several multiferroic materials of different composition. The list includes E-type manganites, RMnO$_3$, nickelates such as in YNiO$_3$ and other materials under strain, such as TbMnO$_3$. In spite of its simplicity, the model presented here captures the essence of the origin of multiferroicity in a large class of type II multiferroics., Comment: 5 pages, 5 figures, Sup Info
- Published
- 2021
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