DFT study of Rb/Si(100)-2x1 System

Details DFT study of Rb/Si(100)-2x1 System DFT study of Rb/Si(100)-2x1 System

2005-01-14

arxiv.org/abs/cond-mat/0501349v1

Surf. Sci. 583 (2005) 119

Physics

Condensed Matter

Strongly Correlated Electrons

10 pages, 4 figures

Scientific paper

10.1016/j.susc.2005.03.030

We have investigated Rb adsorption on the Si(100) surface for 0.5 and 1 monolayer coverages using the total energy method with norm-conserving pseudopotentials. For 2$\times$1 reconstruction at 1 ML coverage symmetrized dimers are found to be energetically more favorable. On the other hand, half a ML coverage is found to have symmetrical dimers only for the most stable adsorption model. All possible surface-adatom configurations have been considered in the calculations to find which adsorption sites are energetically favored. In addition to the structural properties, the interface is investigated electronically for the work function and surface states. The results are discussed and compared with the existing experimental findings.

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