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Open Access item In situ measurements of As/P exchange during InAs/InP(0 0 1) quantum wires growth

Authors:González, María Ujué
García, Jorge M.
González, Luisa
Silveira, Juan Pedro
González, Yolanda
Gómez, J. D.
Briones Fernández-Pola, Fernando
Keywords:In situ stress measurements, As/P exchange, Nanostructures, Heteroepitaxy, Molecular beam epitaxy
Issue Date:13-Mar-2002
Publisher:Elsevier
Citation:Applied Surface Science 188(1-2): 188-192 (2002)
Abstract:Unintentional As/P exchange has a significant influence on InAs/InP nanostructures growth. In this paper, we report on the As/P exchange reactions at different temperatures studied by in situ stress measurements and reflectance difference (RD) characterization. When arsenic atoms are incorporated at the InP surface, an asymmetric stress is built up that is responsible for quantum wires (QWr) formation. We obtain that arsenic atoms do not actively displace phosphorous from the surface at the range of surface temperatures and exposure times of interest for growth of InAs nanostructures by molecular beam epitaxy (MBE). Instead, the arsenic atoms bind to available In atoms left vacant by phosphorous desorption at the corresponding temperature.
Description:5 páginas, 4 figuras.-- Comunicación oral presentada al E-MRS 2001 Spring Meeting, Symposium M; Stress and Strain in Heteroepitaxy celebrado en Estrasburgo (Francia/2001).
Publisher version (URL):http://dx.doi.org/10.1016/S0169-4332(01)00744-9
URI:http://hdl.handle.net/10261/32066
ISSN:0169-4332
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