Coupled spin-charge dynamics in magnetic van der Waals heterostructures
Coupled spin-charge dynamics in magnetic van der Waals heterostructures
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DOI：
10.1103/physrevb.102.094421
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发表时间：
2020-09-18
影响因子：
3.7
通讯作者：
Upadhyaya, Pramey
中科院分区：
文献类型：
--
作者：
Rustagi, Avinash;Solanki, Abhishek Bharatbhai;Upadhyaya, Pramey
提出了磁性货车德瓦耳斯（vdW）异质结构中自旋-电荷耦合动力学的唯象理论。研究的系统由一个层状反铁磁体插入到电容vdW异质结构。最近已经证明，在这种层状反铁磁体中的电荷掺杂可以调制层间磁化强度之间的交换耦合的强度，甚至符号。这提供了用于电生成磁化动力学的机制。我们在这里预测的中心结果是，磁化动力学导致感应电荷流。这样的动力学使得磁性货车范德华异质结构成为自旋电子学应用的有趣候选者。为此，我们还表明，这些系统可用于将亚太赫兹辐射诱导的磁化动力学转换成电信号。
We present a phenomenological theory for coupled spin-charge dynamics in magnetic van der Waals (vdW) heterostructures. The system studied consists of a layered antiferromagnet inserted into a capacitive vdW heterostructure. It has been recently demonstrated that charge doping in such layered antiferromagnets can modulate the strength, and even the sign, of exchange coupling between the layer magnetizations. This provides a mechanism for electrically generating magnetization dynamics. The central result we predict here is that the magnetization dynamics reciprocally results in inducing charge flows. Such dynamics makes magnetic van der Waals heterostructures interesting candidates for spintronics applications. To this end, we also show that these systems can be used to convert subterahertz-radiation-induced magnetization dynamics into electrical signals.