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Title: The early stage of formation of self-organized nanocolumns in thin films: Monte Carlo simulations versus atomic-scale observations in Ge-Mn

Formation kinetics of self-organized nanocolumns during epitaxial growth of a thin film composed of immiscible elements (A,B) has been investigated using Kinetic Monte Carlo simulations. Simulated nanostructures show a good agreement with those observed in Ge-Mn using Atom Probe Tomography and Transmission Electron Microscopy. Self organisation is observed although the rigid lattice simulations used do not account for misfit elastic strain. Simulations reveal that the final nanostructure, in term of number density and diameter of nanocolumns, is controlled by the early stages of growth of the film. The influence of both growth temperature and solute concentration on the nanostructure features is discussed in details.
Authors:
; ; ; ;  [1]
  1. Groupe de Physique des Matériaux (GPM) UMR 6634, Normandie Université, Université et INSA de Rouen - CNRS, Av. de l'Université, BP 12, 76801 Saint Etienne du Rouvray (France)
Publication Date:
OSTI Identifier:
22278117
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 115; Journal Issue: 5; 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; COMPUTERIZED SIMULATION; CONCENTRATION RATIO; CRYSTAL LATTICES; ELASTICITY; EPITAXY; GERMANIUM; MANGANESE; MONTE CARLO METHOD; NANOSTRUCTURES; STRAINS; TEMPERATURE DEPENDENCE; THIN FILMS; TOMOGRAPHY; TRANSMISSION ELECTRON MICROSCOPY