We have developed a novel nuclear magnetic resonance (NMR) system that uses spin injection from a highly polarized spin source. Efficient spin injection into GaAs from a half-metallic spin source of Mn-rich Co2MnSi enabled an efficient dynamic nuclear polarization of Ga and As nuclei in GaAs and a sensitive detection of NMR signals. Moreover, coherent control of nuclear spins, or the Rabi oscillation between two quantum levels formed at Ga nuclei, induced by a pulsed NMR has been demonstrated at a relatively low magnetic field of ∼0.1 T. This provides a novel all-electrical solid-state NMR system with the high spatial resolution and high sensitivity needed to implement scalable nuclear-spin based qubits.
Tetsuya Uemura, Takafumi Akiho, Yuya Ebina, and Masafumi Yamamoto, "Coherent manipulation of nuclear spins using spin injection from a half-metallic spin source," Proc. SPIE 9931, Spintronics IX, 99311L (Presented at SPIE Nanoscience + Engineering: August 30, 2016; Published: 26 September 2016); https://doi.org/10.1117/12.2238793.
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