Atomic configurations at InAs partial dislocation cores associated with Z-shape faulted dipoles.

Abstract

The atomic arrangements of two types of InAs dislocation cores associated by a Z-shape faulted dipole are observed directly by aberration-corrected high-angle annular-dark-field imaging. Single unpaired columns of different atoms in a matrix of dumbbells are clearly resolved, with observable variations of bonding lengths due to excess Coulomb force from bare ions at the dislocation core. The corresponding geometric phase analysis provides confirmation that the dislocation cores serve as origins of strain field inversion while stacking faults maintain the existing strain status.

• Authors: Luying Li, Zhaofeng Gan, Martha R McCartney, Hanshuang Liang, Hongbin Yu, Yihua Gao, Jianbo Wang, David J Smith
• Journal: Scientific reports (Sci Rep) Vol. 3 Pg. 3229 (Nov 15 2013) ISSN: 2045-2322 [Electronic] England
• PMID: 24231692 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't, Research Support, U.S. Gov't, Non-P.H.S.)