Two-Dimensional Solids and Their Interaction with Substrates
Adsorbed monolayers on an ideal substrate may exhibit solid phases incommensurable with the substrate. Near the transition to a commensurable solid state (C-I transition) the incommensurable phase can be described as an array of walls separating nearly registered domains.
After a review of earlier theories, the properties of the incommensurable phase are studied near the C-I transition. In the case of an anisotropic substrate, a continuous transition is predicted both at T=0 and T≠0, but with different critical behaviour. For a hexagonal substrate a first order transition is predicted except possibly at T=0.
KeywordsAdsorbed Layer Critical Behaviour Reciprocal Lattice Vector Incommensurable Phase Commensurable Phase
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