Ground states of a one-dimensional lattice-gas model with an infinite range nonconvex interaction. A numerical study
arXiv:cond-mat/9606047 · doi:10.1103/PhysRevB.54.5955
Abstract
We consider a lattice-gas model with an infinite range pairwise noncovex interaction. It might be relevant, for example, for adsorption of alkaline elements on W(112) and Mo(112). We study a competition between the effective dipole-dipole and indirect interactions. The resulting ground state phase diagrams are analysed (numerically) in detail. We have found that for some model parameters the phase diagrams contain a region dominated by several phases only with periods up to nine lattice constants. The remaining phase diagrams reveal a complex structure of usually long periodic phases. We also discuss a possible role of surace states in phase transitions.
16 pages, 5 Postscript figures; Physical Review B15 (15 August 1996), in press