Microscopic origin of magnetoelectric coupling in noncollinear multiferroics

被引：44

作者：

Hu, Jiangping ^{[1
]}

机构：

[1] Purdue Univ, Dept Phys, W Lafayette, IN 47007 USA

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 100卷 / 07期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.100.077202

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

An universal microscopic mechanism to understand the interplay between the electric and magnetic degrees of freedom in noncollinear multiferroics is developed. In a system with a strong spin-orbit coupling, we show that there is a pure electric mechanism that the ferroelectricity is generated by noncollinear magnetism through an electric current cancellation process, which saves the pure electric energy. This mechanism provides a simple estimation and sets a physical limitation of the value of ferroelectricity in noncollinear multiferroic materials.

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页数：4

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