Andreev current induced by ferromagnetic resonance

Details Andreev current induced by ferromagnetic resonance Andreev current induced by ferromagnetic resonance

2012-04-06

arxiv.org/abs/1204.1491v1

Physics

Condensed Matter

Superconductivity

5 pages, 3 figures

Scientific paper

We study charge transport through a metallic dot coupled to a superconducting and a ferromagnetic lead with a precessing magnetization due to ferromagnetic resonance. Using the quasiclassical theory, we find that the magnetization precession induces a dc current in the subgap regime even in the absence of a bias voltage. This effect is due to the rectification of the ac spin currents at the interface with the ferromagnet; it exists in the absence of spin current in the superconductor. When the dot is strongly coupled to the superconductor, we find a strong enhancement in a wide range of parameters as compared to the induced current in the normal state.

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