Generating fully spin‐polarized currents (FSPC) and pure spin currents (PSC) are of great importance for spintronics. Half‐metallic ferromagnets, which generate 100% spin polarization, are considered as one of the most promising materials for applications in spintronics. However, the knowledge of intrinsic half‐metallic materials in the spin‐dependent photogalvanic effect is still poorly understood. Using first‐principle transport calculations, a robust approach is introduced to obtain FSPC and PSC by spin‐dependent photogalvanic effect in intrinsic half‐metallic materials. Based on the recently synthesized monolayer half‐metallic C(CN)3, a 2D spin photogalvanic device is built and it is demonstrated that the FSPC can be achieved in a wider photon energy range under both linearly and elliptically polarized light due to the half‐metallicity. It is intriguing to note that the device can be easily manipulated to transition between two modes: one for generating FSPC and another for generating PSC by setting the two leads in anti‐parallel configurations. Furthermore, a significant spin‐valve effect can be attained across various photon energies for both linearly and elliptically polarized light. The research shows that half‐metallic materials are an ideal platform for studying and generating FSPC and PSC, which presents a remarkable avenue for the development of advanced spintronic devices in the next generation.

中文翻译：

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基于二维半金属铁磁体的多功能自旋光电器件

产生全自旋极化电流（FSPC）和纯自旋电流（PSC）对于自旋电子学非常重要。半金属铁磁体可产生 100% 自旋极化，被认为是自旋电子学应用中最有前途的材料之一。然而，对自旋相关光电池效应中本征半金属材料的了解仍然知之甚少。使用第一原理输运计算，引入了一种鲁棒的方法，通过本征半金属材料中的自旋相关光电效应获得 FSPC 和 PSC。基于最近合成的单层半金属C(CN)3构建了二维自旋光电器件，并证明由于半金属性，在线偏振光和椭圆偏振光下可以在更宽的光子能量范围内实现 FSPC。有趣的是，可以轻松操纵该器件在两种模式之间转换：一种用于生成 FSPC，另一种用于通过将两条引线设置为反平行配置来生成 PSC。此外，对于线性和椭圆偏振光，可以在各种光子能量上获得显着的自旋阀效应。研究表明，半金属材料是研究和生成 FSPC 和 PSC 的理想平台，为下一代先进自旋电子器件的开发提供了一条非凡的途径。