空中骑兵
物理
凝聚态物理
磁性
多铁性
旋转
铁电性
联轴节(管道)
材料科学
偶极子
极化密度
自旋(空气动力学)
磁化
量子力学
磁场
电介质
热力学
冶金
作者
Hong Jian Zhao,Peng Chen,Sergey Prosandeev,Sergey Artyukhin,L. Bellaïche
出处
期刊:Nature Materials
[Springer Nature]
日期:2020-10-12
卷期号:20 (3): 341-345
被引量:46
标识
DOI:10.1038/s41563-020-00821-3
摘要
The Dzyaloshinskii–Moriya interaction (DMI) between two magnetic moments mi and mj is of the form $${\rm{D}}_{ij} \cdot ({\rm{m}}_i \times {\rm{m}}_j)$$
. It originates from spin–orbit coupling, and is at the heart of fascinating phenomena involving non-collinear magnetism, such as magnetic topological defects (for example, skyrmions) as well as spin–orbit torques and magnetically driven ferroelectricity, that are of significant fundamental and technological interest. In sharp contrast, its electric counterpart, which is an electric DMI characterized by its $${{\bf{D}}}_{ij}^{\prime}$$
strength and describing an interaction between two polar displacements ui and uj, has rarely been considered, despite the striking possibility that it could also generate new features associated with non-collinear patterns of electric dipoles. Here we report first-principles simulations combined with group theoretical symmetry analysis which not only demonstrate that electric DMI does exist and has a one-to-one correspondence with its magnetic analogue, but also reveals a physical source for it. These findings can be used to explain and/or design phenomena of possible technological importance in ferroelectrics and multiferroics. The Dzyaloshinskii–Moriya interaction (DMI) enables coupling of magnetic spins and is responsible for non-collinear phenomena such as skyrmions. Here, using first-principles simulations and group theory analysis, it is demonstrated that an electric DMI exists and is analogous to the magnetic DMI.
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