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arXiv · 1207.7243

Gate-Control of Spin Precession in Quantum Hall Edge States

T. Nakajima·Kuan-Ting Lin·S. Komiyama
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Abstract

Electrical control and detection of spin precession are experimentally demonstrated by using spin-resolved edge states in the integer quantum Hall regime. Spin precession is triggered at a corner of a biased metal gate, where electron orbital motion makes a sharp turn leading to a nonadiabatic change in the effective magnetic field via spin-orbit interaction. The phase of precession is controlled by the group velocity of edge-state electrons tuned by gate bias voltage: A spin-FET device is thus realized by all-electrical means, without invoking ferromagnetic material. The effect is also interpreted in terms of a Mach-Zehnder-type spin interferometer.

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T. Nakajima, Kuan-Ting Lin, S. Komiyama. 2012-08-02. Gate-Control of Spin Precession in Quantum Hall Edge States. https://arxiv.org/abs/1207.7243

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