Symmetry analysis of current-induced switching of antiferromagnets
Symmetry analysis of current-induced switching of antiferromagnets
复制标题
反铁磁体电流感应开关的对称性分析
DOI：
10.1103/physrevb.98.220412
复制
发表时间：
2018
影响因子：
3.7
通讯作者：
Yanase Youichi
中科院分区：
文献类型：
--
作者：
Watanabe Hikaru;Yanase Youichi
反铁磁体对外部电场和磁场具有很强的抵抗力，因此看起来是不可控的。然而，最近的研究通过反铁磁埃德尔斯坦效应实现了反铁磁体的电操纵。我们提出了基于群论方法的电可切换反铁磁体的一般对称性分析。此外，我们还确定了可切换反铁磁体和铁磁顺序之间的直接关系。铁磁顺序的概念阐明了可切换反铁磁体的单向性质，并为反铁磁体的可控性提供了标准。该方案为可切换反铁磁体的完美写入和读取铺平了道路。
Antiferromagnets are robust to external electric and magnetic fields, and hence are seemingly uncontrollable. Recent studies, however, realized the electrical manipulations of antiferromagnets by virtue of the antiferromagnetic Edelstein effect. We present a general symmetry analysis of electrically switchable antiferromagnets based on group-theoretical approaches. Furthermore, we identify a direct relation between switchable antiferromagnets and the ferrotoroidic order. The concept of ferrotoroidic order clarifies the unidirectional nature of switchable antiferromagnets and provides a criterion for the controllability of antiferromagnets. The scheme paves a way for perfect writing and reading of switchable antiferromagnets.