Detection of current-induced spins by ferromagnetic contacts

Details Detection of current-induced spins by ferromagnetic contacts Detection of current-induced spins by ferromagnetic contacts

2006-06-07

arxiv.org/abs/cond-mat/0606193v2

Phys. Rev. Lett. 97, 256601 (2006)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Accpeted for publication in Physical Review Letters, 5 pages, 3 color figures, RevTeX

Scientific paper

10.1103/PhysRevLett.97.256601

Detection of current-induced spin accumulation via ferromagnetic contacts is discussed. Onsager's relations forbid that in a two-probe configuration spins excited by currents in time-reversal symmetric systems can be detected by switching the magnetization of a ferromangetic detector contact. Nevertheless, current-induced spins can be transferred as a torque to a contact magnetization and affect the charge currents in many-terminal configurations. We demonstrate the general concepts by solving the microscopic transport equations for the diffuse Rashba system with magnetic contacts.

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