A model of linear chain submonolayer structures. Application to Li/W(112) and Li/Mo(112)
Abstract
We propose a lattice gas model to account for linear chain structures adsorbed on (112) faces of W and Mo. The model includes a dipole-dipole interaction as well as a long-ranged indirect interaction. We have explicitly demonstrated that the periodic ground states depend on a competition between dipole-dipole and indirect interaction. The effect of temperature is studied within the molecular-field approximation. The numerical results show that for dipole-dipole interaction only, all long periodic linear chain phases are suppressed to low temperatures. However, when the long-range indirect interaction becomes important, the long-periodic linear chain phases start to fill up the phase diagram and develop a high thermal stability. Model parameters are chosen to reconstruct a sequence of long-periodic phases as observed experimentally for Li/Mo(112) and Li/W(112).
Keywords
Cite
@article{arxiv.mtrl-th/9511005,
title = {A model of linear chain submonolayer structures. Application to Li/W(112) and Li/Mo(112)},
author = {F. Bagehorn and J. Lorenc and Cz. Oleksy},
journal= {arXiv preprint arXiv:mtrl-th/9511005},
year = {2009}
}
Comments
RevTeX 9 pages + 5 Postscript figures (included), uses newdoc.sty (included), to be published in Surface Science