Full text loading...
Surface energy density of Ge wetting layer on Si (001) substrate as a function of thickness. Note that layer means that the calculated surface energy density actually presents the surface energy density of substrate.
Schematic illustration of the shape of a coherent QD with a step facet on the substrate surface. is the wetting layer thickness, is the contact angle of QD, and is the half-base length of QD.
(a) The calculated contact angle as a function of volume of QDs under a fixed total coverage of 5 ML based on Eq. (6). The black lines represent the calculated results by calculating the minimum energy of different volumes of QDs and the red lines represent the calculated results by calculating the minimum energy of different base lengths of QDs. In these calculations, the contact angle is considered to be discrete, where . The inset shows the total energy difference as a function of volume of QDs for different contact angles. (b) The calculated base area as a function of volume of QDs under a fixed total coverage of 10 ML by Eq. (6).
Article metrics loading...