2007 NSTI Nanotechnology Conference and Trade Show - Nanotech 2007 - 10th Annual

Scanning Tunneling Microscopy Images of Au Adsorbed on GaAs(111)B surface

H. Yi, P. Kratzer, E. Hilner and A. Mikkelsen
KISTI, KR

Keywords:
STM, simulation, adsorption, DFT

Abstract:
We have studied the GaAs(111)B surface with Au deposited either homogeneously or as nanoparticles, and found the presence of Au in either form to give rise to a sqrt(3} x sqrt(3} Au-induced surface reconstruction. In the structural model supported by our DFT calculations for an Au coverage of 1/3 ML, Au atoms are adsorbed at every third threefold hollow hcp site of the Ga lattice. The proposed structural model is in agreement with experimental data from low-energy electron diffraction and STM.

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