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arXiv · 1201.0249

Non-linear spin to charge conversion in mesoscopic structures

Peter Stano·Jaroslav Fabian·Philippe Jacquod
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Abstract

Motivated by recent experiments [Vera-Marun et al., arXiv:1109.5969], we formulate a non-linear theory of spin transport in quantum coherent conductors. We show how a mesoscopic constriction with energy-dependent transmission can convert a spin current injected by a spin accumulation into an electric signal, relying neither on magnetic nor exchange fields. When the transmission through the constriction is spin-independent, the spin-charge coupling is non-linear, with an electric signal that is quadratic in the accumulation. We estimate that gated mesoscopic constrictions have a sensitivity that allows to detect accumulations much smaller than a percent of the Fermi energy.

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Peter Stano, Jaroslav Fabian, Philippe Jacquod. 2011-12-31. Non-linear spin to charge conversion in mesoscopic structures. https://doi.org/10.1103/physrevb.85.241301

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