Spin photogalvanic effect in two-dimensional collinear antiferromagnets
Spin photogalvanic effect in two-dimensional collinear antiferromagnets
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DOI：
10.1038/s41535-021-00334-5
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发表时间：
2020-09
影响因子：
5.7
通讯作者：
Ruijuan Xiao;D. Shao;Yu-Hang Li;Hua Jiang
中科院分区：
文献类型：
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作者：
Ruijuan Xiao;D. Shao;Yu-Hang Li;Hua Jiang
最近发现的二维（2D）反铁磁（AFM）范德华量子材料由于出现的奇异物理现象而引起了越来越多的兴趣。然而，利用二维反铁磁体中固有 AFM 态的自旋电子特性却很少被发现。在这里，我们证明了在三维（3D）反铁磁体中预测的自旋光电池效应（SPGE）可以本质上出现在二维反铁磁体中，从而实现有前景的自旋电子应用。基于蜂窝晶格中可能的 AFM 级数的对称性分析，我们得出了适合实现 SPGE 的二维 AFM 候选材料。我们选择两种实验合成的二维共线AFM材料，单层MnPS3和双层CrCl3作为代表材料进行第一性原理计算，发现它们支持相当大的SPGE。共线 2D AFM 材料中的 SPGE 可用于以非接触式超快方式产生纯自旋电流。
Recent discovered two-dimensional (2D) antiferromagnetic (AFM) van der Waals quantum materials have attracted increasing interest due to the emergent exotic physical phenomena. The spintronic properties utilizing the intrinsic AFM state in 2D antiferromagnets, however, have been rarely found. Here we show that the spin photogalvanic effect (SPGE), which has been predicted in three-dimensional (3D) antiferromagnets, can intrinsically emerge in 2D antiferromagnets for promising spintronic applications. Based on the symmetry analysis of possible AFM orders in the honeycomb lattice, we conclude suitable 2D AFM candidate materials for realizing the SPGE. We choose two experimentally synthesized 2D collinear AFM materials, monolayer MnPS3, and bilayer CrCl3, as representative materials to perform first-principles calculations, and find that they support sizable SPGE. The SPGE in collinear 2D AFM materials can be utilized to generate pure spin current in a contactless and ultra-fast way.