A study of Mg adsorption on Si(001) surface from first principles

Details A study of Mg adsorption on Si(001) surface from first principles A study of Mg adsorption on Si(001) surface from first principles

2003-08-18

arxiv.org/abs/cond-mat/0308351v1

Phys. Rev. B 69, 125417 (2004)

Physics

Condensed Matter

Soft Condensed Matter

7 pages, 4 figures

Scientific paper

10.1103/PhysRevB.69.125417

First-principles calculations using density functional theory based on norm-conserving pseudopotentials have been performed to investigate the Mg adsorption on the Si(001) surface for 1/4, 1/2 and 1 monolayer coverages. For both 1/4 and 1/2 ML coverages it has been found that the most favorable site for the Mg adsorption is the cave site between two dimer rows consistent with the recent experiments. For the 1 ML coverage we have found that the most preferable configuration is when both Mg atoms on 2x1 reconstruction occupy the two shallow sites. We have found that the minimum energy configurations for 1/4 ML coverage is a 2x2 reconstruction while for the 1/2 and 1 ML coverages they are 2x1.

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