Size dependence of twin formation energy in cubic SiC at the nanoscale

Autor:	Hyun Woo Shim, Yongfeng Zhang, Hanchen Huang
Rok vydání:	2008
Předmět:	Condensed Matter::Materials Science Crystallography Materials science Physics and Astronomy (miscellaneous) Condensed matter physics Mathematics::General Mathematics Molecular statics Wide-bandgap semiconductor Nanowire Crystal twinning Size dependence Nanoscopic scale Energy (signal processing)
Zdroj:	Applied Physics Letters. 92:261908
ISSN:	1077-3118 0003-6951
Popis:	This letter reports the size dependence of twin formation energy in cubic SiC at the nanoscale, while the bulk value is nearly zero. Atomic edges surround the twin boundary of SiC nanowires, and they are responsible for the finite twin formation energy and its size dependence. Based on classical molecular statics calculations, the average formation energy of convex and concave edges is 73meV∕nm. Effectively, the twin formation energy is inversely proportional to the length of edges surrounding the twin boundary. Results of this letter make it possible to understand large separations of twin boundaries in SiC nanowires.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::0dad9ac3438d77debbf2bc399ae1c210 https://doi.org/10.1063/1.2953976 Zobrazit plný text záznamu