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Physical Review Letters 99 (2007) 126601
Magnetoresistance due to edge spin accumulation
M.I. Dyakonov1

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.
1 :  LPTA - Laboratoire de Physique Théorique et Astroparticules
Physique/Matière Condensée/Systèmes mésoscopiques et effet Hall quantique
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