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Intrinsic decay of spin currents: the spin coulomb drag effect

机译:自旋电流的固有衰减:自旋库仑阻力效应

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We review the properties of spin Coulomb drag, which describes the effects of the "friction" arising between different spin-polarized carrier populations when they travel with different average velocities. We compare this effect with the ordinary Coulomb drag between separate slabs underlining some important differences related to the form of the Coulomb interaction in the two cases. We show that the spin-transresistivity, a measure of the spin Coulomb drag effect, can become as high as 10{sup}(-2) - 10{sup}(-3) Ωcm in three dimensions and of the order of several kiloohms in two dimensions. We finally underline that, in some realistic systems, the spin transresistivity can become comparable to the usual Drude resistivity.
机译:我们回顾了自旋库仑阻力的性质,该性质描述了当不同自旋极化的载流子群以不同的平均速度传播时产生的“摩擦”的影响。我们将这种效果与独立平板之间的普通库仑阻力进行了比较,强调了两种情况下与库仑相互作用形式有关的一些重要差异。我们表明,自旋电阻率是自旋库仑阻力效应的量度,在三个维度上都可以高达10 {sup}(-2)-10 {sup}(-3)Ωcm,约为几千欧姆在两个方面。我们最后强调,在某些实际系统中,自旋跨阻率可以与通常的Drude电阻率相媲美。

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