Magnetotransport signatures of the proximity exchange and spin-orbit couplings in graphene
Magnetotransport signatures of the proximity exchange and spin-orbit couplings in graphene
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DOI：
10.1103/physrevb.94.195401
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发表时间：
2016-08
影响因子：
3.7
通讯作者：
Jeongsu Lee;J. Fabian
中科院分区：
文献类型：
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作者：
Jeongsu Lee;J. Fabian
石墨烯在绝缘铁磁衬底上，铁磁绝缘体或具有隧道势垒的铁磁金属上，由于邻近效应，预计会表现出较大的交换和自旋轨道耦合。我们使用一个现实的传输模型的电荷无序散射和解决的线性玻尔兹曼方程数值精确的各向异性费米轮廓的修改狄拉克电子找到这些邻近效应的磁输运签名：邻近各向异性磁阻，反自旋电流效应，和平面霍尔电阻率。我们建立了相应的各向异性，由于交换和自旋轨道耦合，相对于磁化方向。我们还提出了参数图，指导观察运输磁各向异性接近石墨烯的最佳制度。
Graphene on an insulating ferromagnetic substrate\char22{}ferromagnetic insulator or ferromagnetic metal with a tunnel barrier\char22{}is expected to exhibit large exchange and spin-orbit couplings due to proximity effects. We use a realistic transport model of charge-disorder scattering and solve the linearized Boltzmann equation numerically exactly for the anisotropic Fermi contours of modified Dirac electrons to find magnetotransport signatures of these proximity effects: proximity anisotropic magnetoresistance, inverse spin-galvanic effect, and the planar Hall resistivity. We establish the corresponding anisotropies due to the exchange and spin-orbit couplings, with respect to the magnetization orientation. We also present parameter maps guiding towards optimal regimes for observing transport magnetoanisotropies in proximity graphene.