Dzyaloshinskii–Moriya Interaction-Dominated Single-Layer Janus Nanosheets for Spintronic Devices

作者：Xinlong Yang, Hongda Wei, Fawei Zheng · 发表于：ACS Applied Nano Materials · 年份：2024 · DOI：10.1021/acsanm.4c05257 · 被引用次数：4 · 研究领域：ZnO doping and properties、Characterization and Applications of Magnetic Nanoparticles、Micro and Nano Robotics

The Dzyaloshinskii–Moriya interaction (DMI), a primary source of complex magnetic structures, has attracted considerable attention over the past decades. However, the DMI is weaker than the Heisenberg interaction in most materials. This limitation hinders its fundamental study and device application. Here, we propose a unique method that combines strain and the Janus structure to achieve a strong DMI in two-dimensional magnetic materials. We applied this scheme to a Janus CrSeTe single layer. The ratio of the DMI to the Heisenberg interaction becomes very large when the strain is around −3.5%, leading to DMI-dominated magnetic properties. Various magnetic structures, such as the 120° Néel state, spin spiral state, and skyrmion state, exist at different strain levels. Our study indicates that this method holds promise for designing new magnetic materials and could be applied to spintronic devices.