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Title: Mechanism of acoustically induced diffusional structuring of surface adatoms

Physical mechanisms of time-averaged structuring of adatoms induced by a standing surface acoustic wave (SAW) on a solid substrate are studied. Despite some similarity with conventional mechanisms based on averaging of fast oscillation-type motion or radiation-pressure effects, we demonstrate that, for diffusional (i.e., strongly damped) adatom motion, the origin of time-averaged structuring is essentially different. The proposed analytical model and kinetic Monte–Carlo (kMC) simulations reveal several distinct structuring regimes and directly relate them to the transient modification of diffusion barriers and adiabatic temperature variations induced by SAW strains.
Authors:
;  [1] ;  [1] ;  [2]
  1. Department of Materials Science and Engineering, University of Virginia, Virginia 22904 (United States)
  2. (Russian Federation)
Publication Date:
OSTI Identifier:
22253948
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 103; Journal Issue: 22; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; DIFFUSION BARRIERS; OSCILLATIONS; RADIATION PRESSURE; SIMULATION; SOLIDS; SOUND WAVES; SURFACES