Berlin 2012 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 66: Nanostructures at surfaces III

O 66.10: Vortrag

Donnerstag, 29. März 2012, 12:45–13:00, MA 042

Continuum modeling of particle redeposition during ion-beam erosion — •Christian Diddens and Stefan J. Linz — Institut für Theoretische Physik, Universität Münster, Wilhelm-Klemm-Straße 9, 48149 Münster, Germany

We have studied the redeposition mechanism during ion-beam erosion and its impact on the formation of nanopatterns within a suitable continuum model [1]. Since particle redeposition is a complex and highly non-local process, one is interested in an approximation which holds for generic surface morphologies. The detailed analysis of this model reveals, that the redeposition yield can be approximated by a Taylor expansion around the surface mean height, as it has already been shown in a discrete solid-on-solid model [2]. In addition, by combining a common erosion model (Kuramoto-Sivashinsky equation) with the presented redeposition model, we show, that redeposition of eroded particles is able to trigger the emergence of long-range ordered nanopatterns.

[1] C. Diddens, S. J. Linz, unpublished

[2] N. Anspach, S. J. Linz, J. Stat. Mech., P06023 (2010)