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Title: Lattice distortion in single crystal rare-earth arsenide/GaAs nanocomposites

Epitaxial single crystal nanocomposites comprised of rare-earth arsenide nanoparticles embedded in GaAs (001) layers produce a larger change in lattice parameter than expected from the lattice parameters of relaxed films. Despite similar cubic structures and lattice parameters, elongation of the interfacial bond length between the two materials induces additional strain causing an expansion in the nanocomposite lattice. The interface bond length is material dependent with an average atomic layer spacing at the ErAs:GaAs interface of 1.9 Å while the spacing at the ScAs:GaAs interface is only 1.4 Å. Implications for lattice matching various single crystal epitaxial nanostructures in semiconductors are discussed.
Authors:
 [1] ;  [2] ;  [1] ;  [3]
  1. Materials Department, University of California, Santa Barbara, California 93106-5050 (United States)
  2. Department of Electrical and Computer Engineering, University of California, Santa Barbara, California 93106-9560 (United States)
  3. (United States)
Publication Date:
OSTI Identifier:
22283104
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 104; Journal Issue: 7; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 77 NANOSCIENCE AND NANOTECHNOLOGY; BOND LENGTHS; COMPOSITE MATERIALS; EPITAXY; EUROPIUM ARSENIDES; GALLIUM ARSENIDES; HETEROJUNCTIONS; INTERFACES; LATTICE PARAMETERS; LAYERS; MONOCRYSTALS; NANOSTRUCTURES; SEMICONDUCTOR MATERIALS; STRAINS; THIN FILMS