Magnetoresistance due to edge spin accumulation

Details Magnetoresistance due to edge spin accumulation Magnetoresistance due to edge spin accumulation

2007-05-18

arxiv.org/abs/0705.2738v2

Phys. Rev. Lett. 99, 126601 (2007)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 3 figures. Minor corrections corresponding to the published version

Scientific paper

10.1103/PhysRevLett.99.126601

Because of spin-orbit interaction, an electrical current is accompanied by a spin current resulting in spin accumulation near the sample edges. Due again to spin-orbit interaction this causes a small decrease of the sample resistance. An applied magnetic field will destroy the edge spin polarization leading to a positive magnetoresistance. This effect provides means to study spin accumulation by electrical measurements. The origin and the general properties of the phenomenological equations describing coupling between charge and spin currents are also discussed.

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