[en] Ripple patterns formed on Pt(111) through grazing incidence ion beam erosion coarsen rapidly. At and below 450 K coarsening of the patterns is athermal and kinetic, unrelated to diffusion and surface free energy. Similar to the situation for sand dunes, coarsening takes place through annihilation reactions of mobile defects in the pattern. The defect velocity derived on the basis of a simple model agrees quantitatively with the velocity of monatomic steps illuminated by the ion beam.
Disciplines :
Physique
Auteur, co-auteur :
Hansen, Henri
REDINGER, Alex ; University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit
Messlinger, Sebastian
Georgiana, Stoian
Krug, Joachim
Michely, Thomas
Co-auteurs externes :
yes
Langue du document :
Anglais
Titre :
Rapid Coarsening of Ion Beam Ripple Patterns by Defect Annihilation
