Adagideli I, Bauer G E W, Halperin B I
Department of Physics and Astronomy, University of British Columbia, 6224 Agricultural Road, Vancouver, BC V6T 1Z1, Canada.
Phys Rev Lett. 2006 Dec 22;97(25):256601. doi: 10.1103/PhysRevLett.97.256601. Epub 2006 Dec 20.
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 can 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.
讨论了通过铁磁接触检测电流诱导的自旋积累。昂萨格关系表明，在双探针配置中，时间反演对称系统中电流激发的自旋不能通过切换铁磁探测器接触的磁化来检测。然而，电流诱导的自旋可以作为转矩转移到接触磁化，并可以在多端配置中影响电荷电流。我们通过求解具有磁接触的扩散Rashba系统的微观输运方程来演示这些一般概念。
