Triplet interactions and the c(2×2) overlayer phase diagram

G. Ceder, H. Dreyssé and D. de Fontaine

Physica A: Statistical Mechanics and its Applications, 1993, vol. 193, issue 1, 105-113

Abstract: Square lattice phase diagrams are investigated with the extended Ising model, considering pair and triplet interactions. We determine the stability of the c(2×2) structure as a function of different triplet interactions. A systematical study of the asymmetry of the phase diagram shows that the triplet interactions with two nnn bounds play a major role in producing an asymmetric phase diagram. The experimental phase diagram of hydrogen adsorbed on a Pd (001) surface is discussed within this framework.

Date: 1993
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:193:y:1993:i:1:p:105-113

DOI: 10.1016/0378-4371(93)90217-R

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