Self-catalyzed MBE grown GaAs/GaAsxSb1-x core-shell nanowires in ZB and WZ crystal structures

Summary, in English

We have investigated the growth of self-catalyzed GaAs/GaAsxSb1-x core-shell nanowires directly on Si(111) substrates by molecular beam epitaxy. The compositions of the GaAsxSb1-x shells are tuned in a wide range where the Sb-content is varied from 10 to similar to 70%, covering the miscibility gap. In addition, the GaAsxSb1-x shells are grown on both zinc blende (ZB) and wurtzite (WZ) crystal structures. Morphological and structural characterizations of the grown nanowires indicate successful transfer of the GaAs core crystal structure to the GaAsxSb1-x shells for both ZB and WZ nanowires, with slower shell growth rate on the WZ segments.

• Author: Sepideh Gorji; A. Mazid Munshi; Dasa L. Dheeraj; Bjorn-Ove Fimland; Helge Weman; Kimberly Dick Thelander
• Department/s: Solid State Physics; Centre for Analysis and Synthesis; NanoLund: Centre for Nanoscience
• Publishing year: 2013
• Language: English
• Publication/Series: Nanotechnology
• Volume: 24
• Issue: 40
• Links: http://dx.doi.org/10.1088/0957-4484/24/40/405601
• Document type: Journal article
• Publisher: IOP Publishing
• Topic: Nano Technology
• Status: Published
• ISBN/ISSN/Other: ISSN: 0957-4484