Search: id:"swepub:oai:DiVA.org:liu-197533" >
Lattice dynamics an...
Lattice dynamics and carrier recombination in GaAs/GaAsBi nanowires
-
- Jansson, Mattias (author)
- Linköpings universitet,Elektroniska och fotoniska material,Tekniska fakulteten
-
- Nosenko, Valentyna (author)
- Linköpings universitet,Elektroniska och fotoniska material,Tekniska fakulteten
-
- Rudko, Galyna (author)
- Linköpings universitet,Elektroniska och fotoniska material,Tekniska fakulteten
-
show more...
-
- Ishikawa, F. (author)
- Hokkaido Univ, Japan
-
- Chen, Weimin (author)
- Linköpings universitet,Elektroniska och fotoniska material,Tekniska fakulteten
-
- Buyanova, Irina (author)
- Linköpings universitet,Elektroniska och fotoniska material,Tekniska fakulteten
-
show less...
-
(creator_code:org_t)
- NATURE PORTFOLIO, 2023
- 2023
- English.
-
In: Scientific Reports. - : NATURE PORTFOLIO. - 2045-2322. ; 13:1
- Related links:
-
https://liu.diva-por... (primary) (Raw object)
-
show more...
-
https://urn.kb.se/re...
-
https://doi.org/10.1...
-
show less...
Abstract
Subject headings
Close
- GaAsBi nanowires represent a novel and promising material platform for future nano-photonics. However, the growth of high-quality GaAsBi nanowires and GaAsBi alloy is still a challenge due to a large miscibility gap between GaAs and GaBi. In this work we investigate effects of Bi incorporation on lattice dynamics and carrier recombination processes in GaAs/GaAsBi core/shell nanowires grown by molecular-beam epitaxy. By employing photoluminescence (PL), PL excitation, and Raman scattering spectroscopies complemented by scanning electron microscopy, we show that increasing Bi-beam equivalent pressure (BEP) during the growth does not necessarily result in a higher alloy composition but largely affects the carrier localization in GaAsBi. Specifically, it is found that under high BEP, bismuth tends either to be expelled from a nanowire shell towards its surface or to form larger clusters within the GaAsBi shell. Due to these two processes the bandgap of the Bi-containing shell remains practically independent of the Bi BEP, while the emission spectra of the NWs experience a significant red shift under increased Bi supply as a result of the localization effect.
Subject headings
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Publication and Content Type
- ref (subject category)
- art (subject category)
Find in a library
To the university's database