In this letter, the horizontal axis of Fig. 3(a) was inadvertently mislabeled. The correct horizontal axis should extend from rather than . All other aspects of the published figure are correct. The results and conclusions of the paper remain the same. The corrected figure is shown below.
(a) X-ray diffraction - scans for films with carbon doping. From top to bottom, the nominal carbon concentrations are 0, 7.4, 15, 22, 28, 39, 42, and .%. The spectra are shifted vertically for clarity. The peaks labeled with “*” are due to the substrate.
(a) X-ray diffraction - scans for films with carbon doping. From top to bottom, the nominal carbon concentrations are 0, 7.4, 15, 22, 28, 39, 42, and .%. The spectra are shifted vertically for clarity. The peaks labeled with “*” are due to the substrate.