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

来源：

PHYSICAL REVIEW B | 2008年 / 77卷 / 11期

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.

引用

页数：8

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