Optical nuclear spin polarization of divacancies in SiC

Viktor Ivády, Krisztián Szász, Abram L. Falk, Paul V. Klimov, David J. Christle, William F. Koehl, Erik Janzén, Igor A. Abrikosov, David D. Awschalom, A. Gali

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We demonstrate optically pumped dynamic nuclear polarization (DNP) of 29Si nuclear spins that are strongly coupled to paramagnetic color centers in 4H- and 6H-SiC. We observe 99%±1% degree of polarization. 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. In addition, we developed a general model for these optical DNP processes that allows the effects of many microscopic processes to be integrated. Applying this theory, we gain a deeper insight into dynamic nuclear spin polarization. In particular, our findings show that the defect electron spin coherence times and excited state lifetimes are crucial factors in the entire DNP process. These results lay a foundation for SiC-based quantum memories, nuclear gyroscopes, and hyperpolarized probes for magnetic resonance imaging.

Original languageEnglish
Title of host publicationSilicon Carbide and Related Materials 2015
PublisherTrans Tech Publications Ltd
Pages287-290
Number of pages4
Volume858
ISBN (Print)9783035710427
DOIs
Publication statusPublished - 2016
Event16th International Conference on Silicon Carbide and Related Materials, ICSCRM 2015 - Sicily, Italy
Duration: Oct 4 2015Oct 9 2015

Publication series

NameMaterials Science Forum
Volume858
ISSN (Print)02555476

Other

Other16th International Conference on Silicon Carbide and Related Materials, ICSCRM 2015
CountryItaly
CitySicily
Period10/4/1510/9/15

    Fingerprint

Keywords

  • Divacancy
  • Hyperfine interaction
  • Photoluminescence
  • Quantum information processing

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering
  • Mechanics of Materials

Cite this

Ivády, V., Szász, K., Falk, A. L., Klimov, P. V., Christle, D. J., Koehl, W. F., Janzén, E., Abrikosov, I. A., Awschalom, D. D., & Gali, A. (2016). Optical nuclear spin polarization of divacancies in SiC. In Silicon Carbide and Related Materials 2015 (Vol. 858, pp. 287-290). (Materials Science Forum; Vol. 858). Trans Tech Publications Ltd. https://doi.org/10.4028/www.scientific.net/MSF.858.287