Dopant-free twinning superlattice formation in InSb and InP Nanowires

Yuan, Xiaoming, Guo, Yanan, Caroff-Gaonac'h, Philippe ORCID: https://orcid.org/0000-0003-0160-1572, He, Jun, Tan, Hark Hoe and Jagadish, Chennupati 2017. Dopant-free twinning superlattice formation in InSb and InP Nanowires. Physica Status Solidi (Rrl) Rapid Research Letters 11 (11) , 1700310. 10.1002/pssr.201700310

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Abstract

Periodic arrangement of twin planes creates a controllable polytype that can affect both the electronic and optical properties of nanowires. The approach that is most used for inducing twinning superlattice (TSL) formation in III–V nanowires is introducing impurity dopants during growth. Here, we demonstrate that controlling the growth parameters is sufficient to produce regular twinning planes in Au-catalysed InSb and InP nanowires. Our results show that TSL formation in InSb nanowires only exists in a very narrow growth window. We suggest that growth conditions induce a high concentration of In (or Sb) in the Au droplet, which plays a similar role to that of surfactant impurities such as Zn, and increases the droplet wetting angle to yield a geometry that is favorable for TSL formation. The demonstration of TSL structure in InSb and InP nanowires by controlling the input of In (or Sb) further enhances fundamental understanding of TSL formation in III–V nanowires and allows us to tune the properties of these nanowires by crystal phase engineering.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Subjects:	Q Science > QC Physics
Publisher:	Wiley-Blackwell
ISSN:	1862-6254
Date of First Compliant Deposit:	4 December 2017
Date of Acceptance:	22 September 2017
Last Modified:	07 Nov 2023 06:55
URI:	https://orca.cardiff.ac.uk/id/eprint/107218

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