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https://hdl.handle.net/20.500.14279/4358| Title: | Ordering Mechanisms in Epitaxial Sige Nanoislands |
| Authors: | Kelires, Pantelis C. Vantarakis, George Remediakis, Ioannis N. |
| Major Field of Science: | Engineering and Technology |
| Field Category: | Civil Engineering |
| Keywords: | Silicon alloys |
| Issue Date: | 27-Apr-2012 |
| Source: | Physical Review Letters, 2012, vol.108, no.17 |
| Volume: | 108 |
| Issue: | 17 |
| Journal: | Physical Review Letters |
| Abstract: | We investigate and elucidate the surprising observation of atomically ordered domains in dome-shaped SiGe nanoislands. We show, through atomistic MonteCarlo simulations, that this ordering is a surface-related phenomenon, and that is driven by surface equilibrium rather than by surface kinetics. The ordering depends on facet orientation. The main source of ordering is the {15323} facet, while the {105} and {113} facets contribute less. Subsurface ordered configurations self-organize under this facet and are frozen-in and buried during island growth, giving rise to the ordered domains. Ordering mechanisms based on constrained surface kinetics, requiring step-mediated segregation at the island facets, are shown to be much less likely. |
| URI: | https://hdl.handle.net/20.500.14279/4358 |
| ISSN: | 10797114 |
| DOI: | 10.1103/PhysRevLett.108.176102 |
| Rights: | © 2012 American Physical Society. |
| Type: | Article |
| Affiliation : | Cyprus University of Technology University of Crete |
| Appears in Collections: | Άρθρα/Articles |
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