Erratum: Light-induced hyperfine ~(69)Ga shifts in semi-insulating GaAs observed by optically polarized NMR [Phys. Rev. B 74, 153201 (2006)]

摘要

On page 2 of this paper, we depicted in Fig. 2 a fit of the ~(69)Ga OPNMR shift offset with respect to τ_L irradiation time, through numerical analysis of Eq. (3). We found an error in the code, and with the parameters presented in the paper, there no longer is a good match to the experimental data.rnWe depict below the corrected plot. What is shown are two values for isotropic nuclear spin diffusion D of 2300 A2/sec (as reported in the original paper) and 0 A2/sec. The observed data fall between these two extreme values. The shape of the shift dependence on τ_L is still maintained, suggesting that other value(s) of D may be appropriate. Our conclusions for the paper must be modified slightly. In the absence of a good fit to the experimental data, the values of the electron spin polarization cannot be determined. These values were reported on page 3 as -0.10 for σ~+ and 0.14 for σ~- light. In our concluding paragraph we stated: "We have presented a quantitative model of OPNMR that utilizes the hyperfine interaction, between localized electrons and surrounding nuclei, and nuclear spin diffusion." This statement is no longer correct. However, the other conclusions regarding the origin and the helicity dependence of the hyperfine shift still hold.rnThe authors would like to thank Lee Sobotka for helpful discussions.