Phys. Rev. B 74, 153201 (2006) [4 pages]Light-induced hyperfine 69Ga shifts in semi-insulating GaAs observed by optically polarized NMRSee Also: Erratum, Publisher's Note Received 24 May 2006; revised 29 August 2006; published 5 October 2006; publisher error corrected 12 October 2006 We report the observation of 69Ga NMR light induced hyperfine shifts at 6 K in semi-insulating GaAs detected by optically polarized nuclear magnetic resonance in a magnetic field of 4.7 T. The main features of the observed shift are a systematic change in the absolute shift value as the irradiation time is increased, and the sign of the hyperfine shift changes with polarization. The shift dependence on irradiation time can be understood as a combination of the hyperfine interaction of localized electrons with the surrounding nuclear spins and nuclear spin diffusion. © 2006 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.74.153201
DOI:
10.1103/PhysRevB.74.153201
PACS:
78.20.−e, 76.60.Cq, 31.30.Gs, 75.40.Gb
See AlsoErratum: Kannan Ramaswamy, Stacy Mui, and Sophia E. Hayes, Erratum: Light-induced hyperfine 69Ga shifts in semi-insulating GaAs observed by optically polarized NMR [Phys. Rev. B 74, 153201 (2006)], Phys. Rev. B 75, 249903 (2007). Publisher's Note: Kannan Ramaswamy, Stacy Mui, and Sophia E. Hayes, Publisher's Note: Light-induced hyperfine 69Ga shifts in semi-insulating GaAs observed by optically polarized NMR [Phys. Rev. B74, 153201 (2006)], Phys. Rev. B 74, 159901 (2006). |
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