Fractal Dimension of Disordered Submonolayers: Determination from He Scattering Data

Details Fractal Dimension of Disordered Submonolayers: Determination from He Scattering Data Fractal Dimension of Disordered Submonolayers: Determination from He Scattering Data

1995-12-06

arxiv.org/abs/chem-ph/9512002v2

Chem. Phys. Lett. 253 (1996) 223

Physics

Chemical Physics

12 pages, 4 figures, replaced with revised version. More info available at http://www.fh.huji.ac.il/~dani/ . Chem. Phys. Lett.

Scientific paper

10.1016/0009-2614(96)00259-X

We propose a novel method to measure the fractal dimension of a submonolayer metal adatom system grown under conditions of limited diffusivity on a surface. The method is based on measuring the specular peak attenuation of He atoms scattered from the surface, as a function of incidence energy. The (Minkowski) fractal dimension thus obtained is that of contours of constant electron density of the adatom system. Simulation results are presented, based on experimental data. A coverage dependent fractal dimension is found from a two-decade wide scaling regime.

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