Multi-Functional Spin Photogalvanic Device Based on 2D Half-Metallic Ferromagnets,Advanced Electronic Materials

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Multi-Functional Spin Photogalvanic Device Based on 2D Half-Metallic Ferromagnets
Advanced Electronic Materials ( IF 5.3 ) Pub Date : 2024-03-11 , DOI: 10.1002/aelm.202300884
Zhentao Fu _{1,

2} , Pinglan Yan _{1,

2} , Jin Li _{1,

2} , Chaoyu He _{1,

2} , Tao Ouyang _{1,

2} , Chao Tang _{1,

2} , Jianxin Zhong ₁

Affiliation

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：

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，人们对本征半金属材料自旋相关光电效应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，并证明了由于半偏振光的存在，可以在线偏振光和椭圆偏振光下在更宽的光子能量范围内实现FSPC。金属性。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并行配置来生成 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。

更新日期：2024-03-11

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