Spectroscopy of Organic Molecule/Ferromagnetic Metal Interface for Highly Efficient Room Temperature Spin injection into Graphene

在这项研究中，单层石墨烯和Ni（111）薄膜之间的界面上的自旋结构，采用深度分辨的X射线吸收和磁性圆二色光谱与原子层分辨率的探索。的深度分辨Ni L2，3-边缘分析澄清，Ni原子层相邻的界面显示的自旋取向的过渡到垂直的一个在体区域中的面内的一个相反。C-K边分析表明，界面处的p-d杂化以及石墨烯p带区域的面外自旋极化导致了自旋-轨道相互作用的增强.本研究表明，在石墨烯基自旋电子学的原子层水平上的界面设计的重要性。

In this study, the spin structures across the interface between single-layer graphene and a Ni(111) thin film are explored by employing the depth-resolved x-ray absorption and magnetic circular dichroism spectroscopy with the atomic layer resolution. The depth-resolved Ni L2,3-edge analysis clarifies that the Ni atomic layers adjacent to the interface show a transition of the spin orientation to the perpendicular one in contrast with the in-plane one in the bulk region. The C K-edge analysis reveals the intensifying of the spin-orbital interactions induced by the p-d hybridization at the interface as well as out-of-plane spin polarization at the p band region of graphene. The present study indicates the importance of the interface design at the atomic layer level for graphene-based spintronics.