Temperature-Dependent Magnetoelectric Effect from First Principles

被引:91
作者
Mostovoy, Maxim [1 ]
Scaramucci, Andrea [1 ]
Spaldin, Nicola A. [2 ]
Delaney, Kris T. [2 ]
机构
[1] Univ Groningen, Zernike Inst Adv Mat, Nijenborgh 4, Netherlands
[2] Univ Calif Santa Barbara, Dept Mat, Santa Barbara, CA 93106 USA
基金
美国国家科学基金会;
关键词
THEORETICAL METHODS; POLARIZATION;
D O I
10.1103/PhysRevLett.105.087202
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We show that nonrelativistic exchange interactions and spin fluctuations can give rise to a linear magnetoelectric effect in collinear antiferromagnets at elevated temperatures that can exceed relativistic magnetoelectric responses by more than 1 order of magnitude. We show how symmetry arguments, ab initio methods, and Monte Carlo simulations can be combined to calculate temperature-dependent magnetoelectric susceptibilities entirely from first principles. The application of our method to Cr2O3 gives quantitative agreement with experiment.
引用
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页数:4
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