发表机构
Ioffe Institute（约费研究所）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究证明扭曲和矢量光束可通过结构光诱导的自旋电流及自旋弛豫扩散，实现二维狄拉克电子的空间自旋分离，为光控自旋电子学提供新机制。
AI 中文摘要
我们证明扭曲光束和矢量光束能够将具有相反自旋投影的二维电子在空间上分离。自旋积累源于结构光诱导的发散自旋电流，并结合自旋弛豫与扩散。我们推导了准局域和扩散控制区域中自旋密度的解析表达式，并针对过渡金属二硫化物单层相关参数数值计算了自旋纹理。我们的结果提出了一种机制，通过该机制，光束的扭曲和矢量模式可以印记到电子自旋自由度上。
英文摘要
We demonstrate that twisted and vector optical beams can spatially separate two-dimensional electrons with opposite spin projections. Spin accumulation arises from diverging spin currents induced by structured light together with spin relaxation and diffusion. We derive analytical expressions for the resulting spin density in the quasi-local and diffusion-controlled regimes and numerically calculate the spin textures for the parameters relevant to transition metal dichalcogenide monolayers. Our results suggest a mechanism by which the twist and vector pattern of optical beams can be imprinted onto the electron spin degree of freedom.
Comments6 pages, 2 figures
