Schematic, TEM images, and RBS spectra of samples. (a) Schematic of sample structure, (b) cross-sectional bright-field Z-contrast TEM images of 5-nm-thick a-Ge QW sample, and (c) RBS spectra of a-Ge QWs. The filled areas are proportional to the Ge content of each QW (from 1.0×1016 Ge/cm3 to 13.6×1016 Ge/cm3) as reported in the figure.
Cosentino et al. Nanoscale Research Letters 2013 8:128 doi:10.1186/1556-276X-8-128