Models for Monolayers Adsorbed on a Square Substrate
arXiv:cond-mat/9209016 · doi:10.1016/0039-6028(93)91079-5
Abstract
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.
14 pages, Table (included), Two Figures (available upon request). SU-92-1505