Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5489926 | Journal of Crystal Growth | 2016 | 4 Pages |
Abstract
The shape of the spiral steps was used to experimentally estimate the surface supersaturation of GaAs microchannel epitaxy, whose atomically-flat surface is suitable for the step observation. In the Si-doped sample, the vertical growth rate was found to have a strong relation to the surface supersaturation. The vertical growth is greatly suppressed below a critical value of 0.17%, and it linearly increases with the supersaturation above the value. The mechanism is ascribed to the pinning effects of the dopants on the surface. Reference of the non-doped sample shows that the vertical growth rate is simply proportional to the surface supersaturation, and that the pinning effect disappears.
Keywords
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
Y. Mizuno, M. Tomita, H. Takakura, M. Iwakawa, D. Kambayashi, T. Maruyama, S. Naritsuka,