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arXiv · 1906.02730

Current noise geometrically generated by a driven magnet

Tim Ludwig·Igor S. Burmistrov·Yuval Gefen·Alexander Shnirman
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Abstract

We consider a non-equilibrium cross-response phenomenon, whereby a driven magnetization gives rise to electric shot noise (but no d.c. current). This effect is realized on a nano-scale, with a small metallic ferromagnet which is tunnel-coupled to two normal metal leads. The driving gives rise to a precessing magnetization. The geometrically generated noise is related to a non-equilibrium distribution in the ferromagnet. Our protocol provides a new channel for detecting and characterizing ferromagnetic resonance.

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Tim Ludwig, Igor S. Burmistrov, Yuval Gefen, Alexander Shnirman. 2019-06-06. Current noise geometrically generated by a driven magnet. https://doi.org/10.1103/physrevresearch.2.023221

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