当前位置：
X-MOL 学术
›
Nano Lett.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Unravelling Photoinduced Interlayer Spin Transfer Dynamics in Two-Dimensional Nonmagnetic-Ferromagnetic van der Waals Heterostructures
Nano Letters ( IF 9.6 ) Pub Date : 2021-03-22 , DOI: 10.1021/acs.nanolett.1c00520 Junjie He 1, 2 , Shuo Li 2 , Arkamita Bandyopadhyay 1 , Thomas Frauenheim 1, 3, 4
Nano Letters ( IF 9.6 ) Pub Date : 2021-03-22 , DOI: 10.1021/acs.nanolett.1c00520 Junjie He 1, 2 , Shuo Li 2 , Arkamita Bandyopadhyay 1 , Thomas Frauenheim 1, 3, 4
Affiliation
|
Although light is the fastest means to manipulate the interfacial spin injection and magnetic proximity related quantum properties of two-dimensional (2D) magnetic van der Waals (vdW) heterostructures, its potential remains mostly untapped. Here, inspired by the recent discovery of 2D ferromagnets Fe3GeTe2 (FGT), we applied the real-time density functional theory (rt-TDDFT) to study photoinduced interlayer spin transfer dynamics in 2D nonmagnetic-ferromagnetic (NM-FM) vdW heterostructures, including graphene-FGT, silicene-FGT, germanene-FGT, antimonene-FGT and h-BN-FGT interfaces. We observed that laser pulses induce significant large spin injection from FGT to nonmagnetic (NM) layers within a few femtoseconds. In addition, we identified an interfacial atom-mediated spin transfer pathway in heterostructures in which the photoexcited spin of Fe first transfers to intralayered Te atoms and then hops to interlayered NM layers. Interlayer hopping is approximately two times slower than intralayer spin transfer. Our results provide the microscopic understanding for optically control interlayer spin dynamics in 2D magnetic heterostructures.
中文翻译：
揭示二维非磁性-铁磁性范德华异质结构中的光诱导层间自旋转移动力学
尽管光是控制二维（2D）磁性范德华（vdW）异质结构的界面自旋注入和与磁性邻近相关的量子性质的最快方法，但其潜力仍未得到开发。在这里，受到2D铁磁体Fe 3 GeTe 2的最新发现的启发（FGT），我们应用实时密度泛函理论（rt-TDDFT）研究了二维非磁性-铁磁性（NM-FM）vdW异质结构中的光诱导层间自旋转移动力学，包括石墨烯-FGT，硅烯-FGT，锗烯-FGT ，锑-FGT和h-BN-FGT接口。我们观察到，激光脉冲在几飞秒内引起从FGT到非磁性（NM）层的大量自旋注入。此外，我们在异质结构中发现了界面原子介导的自旋转移途径，其中铁的光激发自旋首先转移至层内Te原子，然后跃迁至层间NM层。层间跳跃比层内自旋转移慢大约两倍。我们的结果为2D磁性异质结构中的光学控制层间自旋动力学提供了微观的理解。
更新日期：2021-04-14
中文翻译：
揭示二维非磁性-铁磁性范德华异质结构中的光诱导层间自旋转移动力学
尽管光是控制二维（2D）磁性范德华（vdW）异质结构的界面自旋注入和与磁性邻近相关的量子性质的最快方法，但其潜力仍未得到开发。在这里，受到2D铁磁体Fe 3 GeTe 2的最新发现的启发（FGT），我们应用实时密度泛函理论（rt-TDDFT）研究了二维非磁性-铁磁性（NM-FM）vdW异质结构中的光诱导层间自旋转移动力学，包括石墨烯-FGT，硅烯-FGT，锗烯-FGT ，锑-FGT和h-BN-FGT接口。我们观察到，激光脉冲在几飞秒内引起从FGT到非磁性（NM）层的大量自旋注入。此外，我们在异质结构中发现了界面原子介导的自旋转移途径，其中铁的光激发自旋首先转移至层内Te原子，然后跃迁至层间NM层。层间跳跃比层内自旋转移慢大约两倍。我们的结果为2D磁性异质结构中的光学控制层间自旋动力学提供了微观的理解。
京公网安备 11010802027423号