Please use this identifier to cite or link to this item: http://ktisis.cut.ac.cy/handle/10488/7437
Title: Ordering mechanisms in epitaxial sige nanoislands
Authors: Kelires, Pantelis C. 
Vantarakis, George 
Remediakis, Ioannis N. 
Keywords: Silicon alloys
Category: Nano-technology
Field: Engineering and Technology
Issue Date: 2012
Publisher: APS American Physical Society
Source: Physical Review Letters,2012, Volume 108, Issue 17
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: http://ktisis.cut.ac.cy/handle/10488/7437
http://ktisis.cut.ac.cy/handle/10488/7437
http://hdl.handle.net/10488/7437
ISSN: 0031-9007 (print)
1079-7114 (online)
DOI: 10.1103/PhysRevLett.108.176102
Rights: © 2012 American Physical Society.
Type: Article
Appears in Collections:Άρθρα/Articles

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