Spin transport in proximity-induced ferromagnetic graphene

被引:459
作者
Haugen, Havard [1 ]
Huertas-Hernando, Daniel [1 ]
Brataas, Arne [1 ]
机构
[1] Norwegian Univ Sci & Technol, Dept Phys, N-7491 Trondheim, Norway
关键词
D O I
10.1103/PhysRevB.77.115406
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Ferromagnetic insulators deposited on graphene can induce ferromagnetic correlations in graphene. We estimate that induced exchange splittings Delta similar to 5 meV can be achieved by, e.g., using the magnetic insulator EuO. We study the effect of the induced spin splittings on the graphene transport properties. The exchange splittings in proximity-induced ferromagnetic graphene can be determined from the transmission resonances in the linear response conductance or, independently, by magnetoresistance measurements in a spin-valve device. The spin polarization of the current near the Dirac point increases with the length of the barrier, so that long systems are required to determine Delta experimentally.
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页数:8
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