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arXiv · 1206.6969

Towards coherent spin precession in pure-spin current

Hiroshi Idzuchi·Yasuhiro Fukuma·YoshiChika Otani
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Abstract

Non-local spin injection in lateral spin valves generates a pure spin current which is a diffusive flow of spins (i.e. spin angular momentums) with no net charge flow. The diffusive spins lose phase coherency in precession while undergoing frequent collisions and these events lead to a broad distribution of the dwell time in a transport channel between the injector and the detector. Here we show the lateral spin-valves with dual injectors enable us to detect a genuine in-plane precession signal from the Hanle effect, demonstrating the phase coherency in the in-plane precession is improved with an increase of the channel length. The coherency in the spin precession shows a universal behavior as a function of the normalized separation between the injector and the detector in material-independent fashion for metals and semiconductors including graphene.

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Hiroshi Idzuchi, Yasuhiro Fukuma, YoshiChika Otani. 2012-06-29. Towards coherent spin precession in pure-spin current. https://arxiv.org/abs/1206.6969

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