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Recent studies have shown that the Si(111)3×3–Ag surface system undergoes a phase transition, accompanying changes in its electronic structure including band splitting as observed by photoemission spectroscopy. We study this system through Monte Carlo simulation considering the disordered nature of the system at high temperature. We construct a simple model for generating the surface atom arrangements...
The Ising model proposed previously for the structural phase transition from (4×1) to (8ד2”) of In-adsorbed Si(111) surface, Hamiltonian of which is consisting of a two-spin interaction as well as a four-spin interaction is shown to be equivalent in thermodynamic properties to a soluble Ising model with two-spin interactions. Temperature dependence of the long range order and the transition temperature...
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