Monte Carlo study of linear chain submonolayer structures.Application to Li/W(112)

Details Monte Carlo study of linear chain submonolayer structures.Application to Li/W(112) Monte Carlo study of linear chain submonolayer structures.Application to Li/W(112)

2003-04-24

arxiv.org/abs/cond-mat/0304565v1

Surface Science 543 (2003) 5-11

Physics

Condensed Matter

Materials Science

7 pages, 7 figures, REVTeX

Scientific paper

10.1016/j.susc.2003.08.020

The lattice gas model for adsorption of alkaline elements on W(112) surface is studied by Monte Carlo simulations. The model includes dipole--dipole interaction as well as long-range indirect interaction. The numerical results show that truncation of the indirect interaction even at 200$\AA$ may change a phase diagram, i.e., new phases containing domain walls might occur. It is demonstrated that a defected phase can exist at high temperatures even if it is not stable at T=0. The phase diagram for Li/W(112) is constructed and long periodic chain structures (9*1), (6*1), (4*1), (3*1), and (2*1) are found to be stable at low temperatures. Role of thermal fluctuation is discussed by comparison of Monte Carlo results with mean field approximation results.

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