TY - JOUR
T1 - When smoothening makes it rough
T2 - Unhindered step-edge diffusion and the meandering instability on metal surfaces
AU - Nita, F.
AU - Pimpinelli, A.
PY - 2005/9/2
Y1 - 2005/9/2
N2 - The precise microscopic origin of step meandering is not known in many real situations. A detailed study of this instability has been made for copper, and none of the microscopic mechanisms proposed until now is able to describe all of the observed characteristic features of the instability, in particular, its dependence on the crystallographic orientations of steps. We propose a novel scenario, and using kinetic Monte Carlo simulations we show that essentially all features of step meandering of copper can be explained, if atoms diffuse along step edges and freely turn around the kinks they encounter along the ledge. Then, in a rather counterintuitive way, step meandering appears due to the very mechanism-step-edge diffusion-that may be expected to oppose it.
AB - The precise microscopic origin of step meandering is not known in many real situations. A detailed study of this instability has been made for copper, and none of the microscopic mechanisms proposed until now is able to describe all of the observed characteristic features of the instability, in particular, its dependence on the crystallographic orientations of steps. We propose a novel scenario, and using kinetic Monte Carlo simulations we show that essentially all features of step meandering of copper can be explained, if atoms diffuse along step edges and freely turn around the kinks they encounter along the ledge. Then, in a rather counterintuitive way, step meandering appears due to the very mechanism-step-edge diffusion-that may be expected to oppose it.
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U2 - 10.1103/PhysRevLett.95.106104
DO - 10.1103/PhysRevLett.95.106104
M3 - Article
AN - SCOPUS:27144443045
SN - 0031-9007
VL - 95
JO - Physical Review Letters
JF - Physical Review Letters
IS - 10
M1 - 106104
ER -