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arXiv · 1104.2353

Measuring Spin Accumulations with Current Noise

Jonathan Meair·Peter Stano·Philippe Jacquod
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Abstract

We investigate the time-dependent fluctuations of the electric current injected from a reservoir with a non-equilibrium spin accumulation into a mesoscopic conductor. We show how the current noise power directly reflects the magnitude of the spin accumulation in two easily noticeable ways. First, as the temperature is lowered, the small-bias noise saturates at a value determined by the spin accumulation. Second, in the presence of spin-orbit interactions in the conductor, the current noise exhibits a sample-dependent mesoscopic asymmetry under reversal of the electric current direction. These features provide for a purely electric protocol for measuring spin accumulations.

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Jonathan Meair, Peter Stano, Philippe Jacquod. 2011-08-26. Measuring Spin Accumulations with Current Noise. https://doi.org/10.1103/physrevb.84.073302

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