Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5489172 | Journal of Crystal Growth | 2017 | 6 Pages |
Abstract
We have investigated the spatial evolution of (nÃ3) surface reconstructed areas during the molecular beam epitaxial growth of InAs-GaAs(001) by using ab initio-based calculation and in situ observation, in order to understand the mechanism of consequent QD nucleation. Statistical analysis of (nÃ3)-reconstructed morphology reveals that the fraction of (8Ã3)-reconstructed areas, as well as those of (4Ã3) and (6Ã3), appears and decreases in the later stage of the growth. This behaviour is consistent with the result of our ab initio-based calculation incorporating chemical potentials of source materials in the gas phase. In contrast, fragmented (2Ã3) areas remain throughout the InAs growth as potential QD nucleation sites.
Keywords
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
Tomoya Konishi, Shiro Tsukamoto, Tomonoroi Ito, Toru Akiyama, Ryo Kaida,