Regensburg 2010 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 71: Metal substrates: Epitaxy and growth

O 71.6: Vortrag

Donnerstag, 25. März 2010, 16:15–16:30, H31

Submonolayer growth of Cu on Cu(110) — •Georg Ciobotea, Andreas Dobler, and Thomas Fauster — Lehrstuhl für Festkörperphysik, Universität Erlangen-Nürnberg, Staudtstr. 7, 91058 Erlangen

The submonolayer growth of Cu on Cu(110) was investigated by scanning tunneling microscopy. Due to the geometry of the Cu(110) surface, diffusion in (110) direction is expected to be dominant.

Island densities and shapes are measured after varying particle flux, coverage and temperature. Below 180 K, long and narrow islands of nearly constant width are found indicating a one-dimensional growth mode. At higher temperature island widths are strongly increasing. A comparison to nucleation theory is presented.

Thermal deposition and pulsed-laser deposition were compared at variable temperatures below 260 K. For pulsed-laser deposition, higher island densities are expected because of the high instantaneous particle flux. This behavior is found at low temperatures, where small adatom mobility is given.