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Title: The effect of nanoscratching direction on the plastic deformation and surface morphology of InP crystals

The microstructure of (001) InP crystals scratched with a sharp diamond tip depends strongly on the scratching direction. The scratch surface is found to conform to the radius of curvature of the tip (∼60 nm) by the formation of atomic crystal steps produced by dislocation glide along (111) planes. 〈110〉 scratches lead to coherent local crystal lattice movement and rotation causing deep dislocation propagation into the crystal and irregular pileups at the sides of the scratch surface. 〈100〉 scratches lead to incoherent lattice movement causing dislocation locking that inhibits their propagation and results in regular pileups.
Authors:
;  [1] ; ;  [2] ;  [3]
  1. Department of Physics, Arizona State University, Tempe, Arizona 85287-1504 (United States)
  2. Departamento de Física, Pontificia Universidade Católica do Rio de Janeiro, Marques de São Vicente 225, Rio de Janeiro, 22453-900 Rio de Janeiro (Brazil)
  3. Divisão de Metrologia de Materiais, Instituto Nacional de Metrologia, Qualidade e Technología (INMETRO), Duque de Caxias, Rio de Janeiro 25250-020 (Brazil)
Publication Date:
OSTI Identifier:
22258736
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 114; Journal Issue: 20; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CRYSTAL LATTICES; CRYSTALS; DIAMONDS; DISLOCATIONS; INDIUM PHOSPHIDES; MICROSTRUCTURE; MORPHOLOGY; PLASTICITY; ROTATION; SURFACES