Estimation of Electrically-Pumped Dynamic Nuclear Polarization in a Quantum Hall Device Using Tilted Magnetic Fields
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概要
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We study the dynamic nuclear polarization (DNP) that is pumped electrically through the hyperfine interaction between electron and nuclear spins along the edge channels in a quantum Hall (QH) device. By comparing the change in the Hall resistance between with and without the electrically-pumped DNP in different tilted magnetic fields, we estimate the effective magnetic field that is induced by the DNP. We conclude that the nuclear spin polarization is correlated with the equilibration length ($L_{\text{eq}}$) of the adiabatic edge-channel transport, which shows that a long $L_{\text{eq}}$ is required to obtain high nuclear spin polarization.
- 2006-06-25
著者
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Hamaya Kohei
Institute Of Industrial Science University Of Tokyo:institute For Nano Quantum Information Electroni
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Machida Tomoki
Institute Of Industrial Science University Of Tokyo
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Masubuchi Satoru
Institute Of Industrial Science University Of Tokyo
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Masubuchi Satoru
Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan
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Hamaya Kohei
Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan
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