Analysis of Strain Fields in Silicon Nanocrystals

Autor:	Yılmaz, Dündar E., Bulutay, Ceyhun, Çağın, Tahir
Rok vydání:	2009
Předmět:	Condensed Matter - Mesoscale and Nanoscale Physics Condensed Matter - Materials Science
Zdroj:	Appl. Phys. Lett. 94, 191914 (2009)
Druh dokumentu:	Working Paper
DOI:	10.1063/1.3138163
Popis:	Strain has a crucial effect on the optical and electronic properties of nanostructures. We calculate the atomistic strain distribution in silicon nanocrystals up to a diameter of 3.2 nm embedded in an amorphous silicon dioxide matrix. A seemingly conflicting picture arises when the strain field is expressed in terms of bond lengths versus volumetric strain. The strain profile in either case shows uniform behavior in the core, however it becomes nonuniform within 2-3 \AA distance to the nanocrystal surface: tensile for bond lengths whereas compressive for volumetric strain. We reconsile their coexistence by an atomistic strain analysis. Comment: Published in Applied Physics Letters Vol. 94, 191914 (2009)
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/0905.3277 Zobrazit plný text záznamu View this record from Arxiv