Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.14279/9783
Title: Stress state of embedded Si nanocrystals
Authors: Kleovoulou, Konstantinos 
Kelires, Pantelis C. 
Major Field of Science: Natural Sciences
Field Category: Physical Sciences
Keywords: Silicon Nitride;Superlattix;Quantum Dot
Issue Date: 21-Aug-2013
Source: Physical Review B, 2013, vol. 88, no. 8
Volume: 88
Issue: 8
Journal: Physical Review B 
Abstract: Monte Carlo simulations shed light on the stress state of Si nanocrystals embedded in amorphous silica, unraveling and explaining its nature and origins. This is achieved by generating detailed stress maps and by calculating the stress profile as a function of size and distance between the nanocrystals. For normal oxide matrix densities, the average stress in the nanocrystal core is found to be compressive, reaching values of 3-4 GPa, in excellent agreement with experimental measurements. It drastically declines at the interface, despite the existence of several highly strained geometries. Tensile conditions prevail in nanocrystals embedded in densified silica matrices. The nanocomposites are shown to be stable, at close interdot distances, against segregation and phase separation.
URI: https://hdl.handle.net/20.500.14279/9783
ISSN: 1550235X
DOI: 10.1103/PhysRevB.88.085424
Rights: © American Physical Society
Type: Article
Affiliation : Cyprus University of Technology 
Publication Type: Peer Reviewed
Appears in Collections:Άρθρα/Articles

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