Theoretical model of dynamic spin polarization of nuclei coupled to paramagnetic point defects in diamond and silicon carbide

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

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

Dynamic nuclear spin polarization (DNP) mediated by paramagnetic point defects in semiconductors is a key resource for both initializing nuclear quantum memories and producing nuclear hyperpolarization. DNP is therefore an important process in the field of quantum-information processing, sensitivity-enhanced nuclear magnetic resonance, and nuclear-spin-based spintronics. DNP based on optical pumping of point defects has been demonstrated by using the electron spin of nitrogen-vacancy (NV) center in diamond, and more recently, by using divacancy and related defect spins in hexagonal silicon carbide (SiC). Here, we describe 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 and the physics of diamond and SiC defects. Our results are in good agreement with experimental observations and provide a detailed and unified understanding. In particular, our findings show that the defect electron spin coherence times and excited state lifetimes are crucial factors in the entire DNP process.

Original languageEnglish
Article number115206
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume92
Issue number11
DOIs
Publication statusPublished - Sep 18 2015

Fingerprint

Spin polarization
Diamond
Point defects
spin dynamics
Silicon carbide
silicon carbides
nuclear spin
carbides
point defects
Diamonds
diamonds
nuclei
polarization
Defects
electron spin
defects
Optical pumping
Magnetoelectronics
Electrons
Excited states

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Theoretical model of dynamic spin polarization of nuclei coupled to paramagnetic point defects in diamond and silicon carbide. / Ivády, Viktor; Szász, Krisztián; Falk, Abram L.; Klimov, Paul V.; Christle, David J.; Janzén, Erik; Abrikosov, Igor A.; Awschalom, David D.; Gali, A.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 92, No. 11, 115206, 18.09.2015.

Research output: Contribution to journalArticle

Ivády, Viktor ; Szász, Krisztián ; Falk, Abram L. ; Klimov, Paul V. ; Christle, David J. ; Janzén, Erik ; Abrikosov, Igor A. ; Awschalom, David D. ; Gali, A. / Theoretical model of dynamic spin polarization of nuclei coupled to paramagnetic point defects in diamond and silicon carbide. In: Physical Review B - Condensed Matter and Materials Physics. 2015 ; Vol. 92, No. 11.
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