Proximity spin interactions in 2D magnetic vdW (hetero)multilayers

二维磁性 vdW（异质）多层中的邻近自旋相互作用

• 批准号: 443416183
• 负责人: Professor Dr. Jaroslav Fabian
• 金额: --
• 依托单位: Institut für Theoretische Physik
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/443416183?language=en
• 关键词: Proximity; spin; interactions; 2D; magnetic

Proximity spin interactions are central to 2D spintronics. Indeed, vdW heterostructures allow to engineer and manipulate SOC and exchange coupling, which is a long sought goal of spintronics, impossible to achieve with conventional bulk materials or even with semiconductor heterostructures such as quantum wells and quantum dots. Gating and doping, strain and pressure, twisting, and stacking, all allow to tailor the spin phenomena in a desired material structure. Motivated by the impressive recent experimental progress in exploring proximity spin interactions in van der Waals heterostructures by spin transport, charge-spin conversion, mesoscopic transport, and effects on strongly correlated phases in twisted and untwisted graphene multilayers, we propose to perform systematic and comprehensive first-principles calculations and phenomenological modeling of proximity spin interactions in large-scale supercells comprising graphene, transition-metal dichalcogenides and magnetic monolayers, as well as mixed-lattice structures comprising hexagonal and rectangular lattices, and effects of the proximity exchange in magnetization dynamics in van der Waal heterostructures.

近邻自旋相互作用是2D自旋电子学的核心。事实上，VDW异质结构允许设计和操纵SOC和交换耦合，这是自旋电子学长期寻求的目标，使用传统的块状材料甚至是量子阱和量子点等半导体异质结构是不可能实现的。浇注和掺杂、应变和压力、扭曲和堆积，所有这些都允许在所需的材料结构中定制自旋现象。在最近通过自旋输运、电荷-自旋转换、介观输运以及对扭转和非扭转石墨烯多层膜中强关联相的影响来探索范德华异质结构中的近邻自旋相互作用方面取得了令人印象深刻的实验进展，我们建议对由石墨烯、过渡金属二卤化物、磁性单层以及由六方和矩形晶格组成的混合晶格结构中的近邻自旋相互作用进行系统和全面的第一性原理计算和唯象模拟，以及范德华异质结构中近邻交换在磁化动力学中的影响。