Gallium adsorption on (0001) GaN surfaces

Details Gallium adsorption on (0001) GaN surfaces Gallium adsorption on (0001) GaN surfaces

2003-04-07

arxiv.org/abs/cond-mat/0304157v1

Physics

Condensed Matter

Materials Science

9 pages, 10 figures

Scientific paper

10.1103/PhysRevB.67.165419

We study the adsorption behavior of Ga on (0001) GaN surfaces combining experimental specular reflection high-energy electron diffraction with theoretical investigations in the framework of a kinetic model for adsorption and ab initio calculations of energy parameters. The measurement of a Ga/GaN adsorption isotherm allows the quantification of the equilibrium Ga surface coverage as a function of the impinging Ga flux. The temperature dependence is discussed within an {\em ab initio} based growth model for adsorption taking into account the nucleation of Ga clusters.

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