Please use this identifier to cite or link to this item: http://ktisis.cut.ac.cy/handle/10488/7535
Title: Lattice parameter of si1-x-ygexcy alloys
Authors: Berti, Marina 
Romanato, Filippo 
Kelires, Pantelis C. 
Keywords: Carbon
Silicon
Germanium
Alloys
Issue Date: 2000
Publisher: APS American Physical Society
Source: Physical Review B - Condensed Matter and Materials Physics,2000, Volume 61, Issue 19, Pages 13005-13013
Abstract: The introduction of carbon into silicon-germanium-based heterostructures offers increased flexibility in tailoring their strain state and electronic properties. Still, however, fundamental physical properties such as the lattice parameter and the elastic properties of Si1-x-yGexCy random alloys are not precisely known. In this paper, we present a quantitative study of the effect of carbon on the lattice parameter of Si1-x-yGexCy alloys in the technologically relevant range of Ge and C compositions. A strong deviation from Vegard's rule is experimentally and theoretically derived. The influence of the correlation between Ge and C on the lattice parameter is discussed. The results allow us to establish the compensation ratio ν of Ge to C concentrations (where the Si1-x-yGexCy epilayer is lattice matched to Si), for which we find a value of ν = 12
URI: http://ktisis.cut.ac.cy/handle/10488/7535
ISSN: 1098-0121
DOI: 10.1103/PhysRevB.61.13005
Rights: ©2000 The American Physical Society.
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