High crystal quality wurtzite-zinc blende heterostructures in metal-organic vapor phase epitaxy-grown GaAs nanowires

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift

Bibtex

@article{4f3c8c89b54e4ee081ac257484f44eb1,
title = "High crystal quality wurtzite-zinc blende heterostructures in metal-organic vapor phase epitaxy-grown GaAs nanowires",
abstract = "We have prepared GaAs wurtzite (WZ)-zinc blende (ZB) nanowire heterostructures by Au particle-assisted metal-organic vapor phase epitaxy (MOVPE) growth. Superior crystal quality of both the transition region between WZ and ZB and of the individual segments themselves was found for WZ-ZB single heterostructures. Pure crystal phases were achieved and the ZB segments were found to be free of any stacking defects, whereas the WZ sections showed a maximum stacking fault density of 20 mu m(-1). The hexagonal cross-sectional wires are terminated by -type side facets for the WZ segment and predominantly {110}-type side facets for the ZB part of the wire. A diameter increase occurred after the transition from WZ to ZB. Additionally, facets of the -type as well as downwards-directed overgrowth of the WZ segments were formed at the WZ to ZB transition to compensate for the observed diameter increase and facet rotation. In the case of WZ-ZB multiple heterostructures, we observed slightly higher densities of stacking faults and twin planes compared to single heterostructures.",
keywords = "Nanowires, GaAs, heterostructure, polytypism, metal-organic vapor phase, epitaxy (MOVPE)-growth",
author = "Sebastian Lehmann and Daniel Jacobsson and Knut Deppert and {Dick Thelander}, Kimberly",
note = "The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Polymer and Materials Chemistry (LTH) (011001041), Solid State Physics (011013006)",
year = "2012",
doi = "10.1007/s12274-012-0232-3",
language = "English",
volume = "5",
pages = "470--476",
journal = "Nano Reseach",
issn = "1998-0124",
publisher = "Springer",
number = "7",

}