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Thermodynamic assessment and binary nucleation modeling of Sn-seeded InGaAs nanowires
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering. Lund University, Sweden.
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering.ORCID iD: 0000-0001-5031-919X
2017 (English)In: Journal of Crystal Growth, ISSN 0022-0248, E-ISSN 1873-5002, Vol. 478, 152-158 p.Article in journal (Refereed) Published
Abstract [en]

We have performed a thermodynamic assessment of the As-Ga-In-Sn system based on the CALculation of PHAse Diagram (CALPHAD) method. This system is part of a comprehensive thermodynamic database that we are developing for nanowire materials. Specifically, the As-Ga-In-Sn can be used in modeling the growth of GaAs, InAs, and InxGa(1-x)As nanowires assisted by Sn liquid seeds. In this work, the AsSn binary, the As-Ga-Sn, As-In-Sn, and Ga-In-Sn ternary systems have been thermodynamically assessed using the CALPHAD method. We show the relevant phase diagrams and property diagrams. They all show good agreement with experimental data. Using our optimized description we have modeled the nucleation of InxGa(1-x)As in the zinc blende phase from a Sn-based quaternary liquid alloy using binary nucleation modeling. We have linked the composition of the solid nucleus to the composition of the liquid phase. Eventually, we have predicted the critical size of the nucleus that forms from InAs and GaAs pairs under various conditions. We believe that our modeling can guide future experimental realization of Sn-seeded InxGa(1-x)As nanowires.

Place, publisher, year, edition, pages
ELSEVIER SCIENCE BV , 2017. Vol. 478, 152-158 p.
Keyword [en]
Phase diagrams, Phase equilibria, Nucleation, Nanostructures, Semiconducting III-V materials
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-217406DOI: 10.1016/j.jcrysgro.2017.08.034ISI: 000413647300025Scopus ID: 2-s2.0-85029355864OAI: oai:DiVA.org:kth-217406DiVA: diva2:1159065
Note

QC 20171121

Available from: 2017-11-21 Created: 2017-11-21 Last updated: 2017-11-21Bibliographically approved

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Selleby, Malin

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