Models for Monolayers Adsorbed on a Square Substrate

Details Models for Monolayers Adsorbed on a Square Substrate Models for Monolayers Adsorbed on a Square Substrate

1992-09-14

arxiv.org/abs/cond-mat/9209016v1

Physics

Condensed Matter

14 pages, Table (included), Two Figures (available upon request). SU-92-1505

Scientific paper

10.1016/0039-6028(93)91079-5

Motivated by recent experimental studies of Hg and Pb monolayers on Cu(001) we introduce a zero temperature model of a monolayer adsorbed on a square substrate. Lennard-Jones potentials are used to describe the interaction between pairs of adlayer-adlayer and adlayer-substrate atoms. We study a special case in which the monolayer atoms form a perfect square structure and the lattice constant, position and orientation with respect to the substrate can vary to minimize the energy. We introduce a rule based on the Farey tree construction to generate systematically the most energetically favored phases and use it to calculate the phase diagram in this model.

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