标题： 石墨烯/铁磁结构中感应磁矩的直接检测和高效的自旋-电荷转换 显示英文标题

标题： Direct detection of induced magnetic moment and efficient spin-to-charge conversion in graphene/ferromagnetic structures

摘要： 本文表明，通过逆Rashba-Edelstein效应（IREE），将单层石墨烯（SLG）的自旋转换为电荷电流成为可能，这是通过将这种卓越的二维材料与独特的铁磁绝缘体钇铁石榴石（YIG = $Y_{3}Fe_{5}O_{12}$）以及铁磁金属坡莫合金（Py = $Ni_{81}Sb_{19}$）结合实现的。 通过X射线吸收谱（XAS）和磁圆二色性（XMCD）技术，我们显示SLG的碳原子由于与磁性层的邻近效应而获得了感应磁矩。 自旋电流由微波驱动的铁磁共振产生的自旋泵浦在磁性层中生成，并在室温下通过石墨烯层的直流电压进行检测。 发生在石墨烯层的自旋到电荷电流的转换是由与铁磁层邻近效应引起的外在自旋轨道相互作用（SOI）解释的。 对于SLG/YIG和SLG/Py系统的实验结果确认了IREE参数非常相似的值，这些值大于之前研究中报道的SLG的值。 我们还通过扫描隧道显微镜（STM）对SLG/YIG的电子和磁性特性进行了系统研究。 显示英文摘要

摘要： This article shows that the spin-to-charge current conversion in single-layer graphene (SLG) by means of the inverse Rashba-Edelstein effect (IREE) is made possible with the integration of this remarkable 2D-material with the unique ferrimagnetic insulator yttrium iron garnet (YIG = $Y_{3}Fe_{5}O_{12}$) as well as with the ferromagnetic metal permalloy (Py = $Ni_{81}Sb_{19}$). By means of X-ray absorption spectroscopy (XAS) and magnetic circular dichroism (XMCD) techniques, we show that the carbon atoms of the SLG acquires an induced magnetic moment due to the proximity effect with the magnetic layer. The spin currents are generated in the magnetic layer by spin pumping from microwave driven ferromagnetic resonance and are detected by a dc voltage along the graphene layer, at room temperature. The spin-to-charge current conversion, occurring at the graphene layer, is explained by the extrinsic spin-orbit interaction (SOI) induced by the proximity effect with the ferromagnetic layer. The results obtained for the SLG/YIG and SLG/Py systems confirm very similar values for the IREE parameter, which are larger than the values reported in previous studies for SLG. We also report systematic investigations of the electronic and magnetic properties of the SLG/YIG by means of scanning tunneling microscopy (STM).