论文标题
在双层石墨烯中，接近诱导的多样化的磁态和可控制的自旋极化：朝向分层的旋转器
Proximity-induced diversified magnetic states and electrically-controllable spin polarization in bilayer graphene: Towards layered spintronics
论文作者
论文摘要
与单层石墨烯相比，Bernal堆叠双层石墨烯（BLG）中的电子具有额外的自由度，在接近性诱导的磁性的帮助下，为开发{\ IT分层的旋转式}提供了一个平台。基于一个有效的现象学模型，我们系统地研究了这种磁化对Fermi能量附近自旋依赖性带结构的影响，并通过与磁铁接近识别BLG诱导的磁相。我们表明，由于这种接近性效应，自旋极化可以在BLG中发展。这种自旋极化在很大程度上取决于磁力的层分布，并且始终可以通过栅极电压控制，该电压转移自旋依赖性带边缘并修改总带间隙。我们进一步表明，可以通过近端引起的交错sublattice电位来改变频带自旋极化。通过在BLG中充分利用层依赖性的磁性，我们提出了自旋滤波器，巨大的磁化设备和自旋二极管等自旋设备可以在完全电动控制下运行，这比公共磁场控制更容易。
Compared to monolayer graphene, electrons in Bernal-stacked bilayer graphene (BLG) have an additional layer degree of freedom, offering a platform for developing {\it layered spintronics} with the help of proximity-induced magnetism. Based on an effective phenomenological model, we systematically study the effect of this magnetism on the spin-dependent band structure near the Fermi energy and identify the magnetic phases induced in BLG by proximity with magnets. We show that spin polarization can develop in BLG due to this proximity effect. This spin polarization depends strongly on the layer distribution of magnetism, and can always be controlled by gate voltage which shifts spin-dependent band edges and modifies the total band gap. We further show that the band spin polarization can be modified by the proximity-induced staggered sublattice potential. By taking full advantage of layer-dependent magnetism in BLG, we propose that spintronic devices such as a spin filter, a giant magnetoresistence device, and a spin diode can operate under fully electric control, which is easier than the common magnetic field control.
