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Title: Unusual nanostructures of “lattice matched” InP on AlInAs

We show that the morphology of the initial monolayers of InP on Al{sub 0.48}In{sub 0.52}As grown by metalorganic vapor-phase epitaxy does not follow the expected layer-by-layer growth mode of lattice-matched systems, but instead develops a number of low-dimensional structures, e.g., quantum dots and wires. We discuss how the macroscopically strain-free heteroepitaxy might be strongly affected by local phase separation/alloying-induced strain and that the preferred aggregation of adatom species on the substrate surface and reduced wettability of InP on AlInAs surfaces might be the cause of the unusual (step) organization and morphology.
Authors:
; ; ; ; ;  [1] ; ; ;  [2]
  1. Tyndall National Institute, University College Cork, “Lee Maltings,” Dyke Parade, Cork (Ireland)
  2. The Blackett Laboratory, Imperial College London, London SW7 2AZ (United Kingdom)
Publication Date:
OSTI Identifier:
22261552
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 104; Journal Issue: 14; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; AGGLOMERATION; INDIUM PHOSPHIDES; LAYERS; MORPHOLOGY; QUANTUM DOTS; STRAINS; VAPOR PHASE EPITAXY