Dresden 2009 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 29: Nanostructures at surfaces: preparation
O 29.8: Vortrag
Mittwoch, 25. März 2009, 12:15–12:30, SCH A01
Ion beam noise may support pattern formation by sputtering — Reiner Kree1, •Taha Yasseri1, and Alexander K. Hartmann2 — 1Institute for Theoretical Physics, University of Göttingen, Friedrich-Hund Platz 1, D-37075 Göttingen, Germany. — 2Institute for Physics, University Oldenburg, Carl-von-Ossietzky Strasse 9-11, D-26111 Oldenburg, Germany
It is discussed in the literature that, beam divergence may produce new scenarios of pattern formation on surfaces by ion beams sputtering (IBS). We have extended the continuum theory and the Monte Carlo simulation of IBS. pattern formation to include noisy beam which is following a Kent distribution, which is a reasonable approximation of the experimentally observed beam divergence.
We found several pattern forming scenarios differing from the Bradley-Harper scenario, which are discussed mainly using Monte Carlo data and a linear mode analysis of the continuum theory.