Optical Polarization of Nuclear Spins in Silicon Carbide

Abram L. Falk, Paul V. Klimov, Viktor Ivády, Krisztián Szász, David J. Christle, William F. Koehl, Ádám Gali, David D. Awschalom

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We demonstrate optically pumped dynamic nuclear polarization of Si29 nuclear spins that are strongly coupled to paramagnetic color centers in 4H- and 6H-SiC. The 99%±1% degree of polarization that we observe at room temperature corresponds to an effective nuclear temperature of 5μK. By combining ab initio theory with the experimental identification of the color centers' optically excited states, we quantitatively model how the polarization derives from hyperfine-mediated level anticrossings. These results lay a foundation for SiC-based quantum memories, nuclear gyroscopes, and hyperpolarized probes for magnetic resonance imaging.

Original languageEnglish
Article number247603
JournalPhysical review letters
Issue number24
Publication statusPublished - Jun 17 2015

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Falk, A. L., Klimov, P. V., Ivády, V., Szász, K., Christle, D. J., Koehl, W. F., Gali, Á., & Awschalom, D. D. (2015). Optical Polarization of Nuclear Spins in Silicon Carbide. Physical review letters, 114(24), [247603]. https://doi.org/10.1103/PhysRevLett.114.247603