Dielectric susceptibility of magnetoelectric thin films with vortex-antivortex dipole pairs

2015/06/25 by Petr Karpov, P. I. Karpov, Karpov, P. I. +3
Engineering · Materials Science · Physics and Astronomy · #FOS: Physical sciences #Ferroelectric and Piezoelectric Materials #Magneto-Optical Properties and Applications #Multiferroics and related materials #Strongly Correlated Electrons (cond-mat.str-el) #cond-mat.str-el

paper · pdf · doi:10.48550/arxiv.1506.07856

9 pages, 3 figures

arxiv created 2015/06/25 · openalex publication_date 2015/06/25 · arxiv updated 2015/06/26 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We consider model of quasi-2D magnetoelectric material as XY model for spin system on a lattice with local multiferroic-like interaction of spin and electric polarization vectors. We calculate the contribution of magnetic (spin) vortex-antivortex pairs (which form electric dipoles) to the dielectric susceptibility of the system. We show that in approximation of non-interacting pairs at T → T_BKT (Berezinskii-Kosterlitz-Thouless temperature) dielectric susceptibility diverges.

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