Vapor-pressure study of the melting of two-dimensional argon adsorbed on BN

Abstract
We have measured monolayer adsorption isotherms of Ar on BN and obtained the compressibility of the Ar films. A small substep in the isotherm is present at melting. Two peaks are present in the compressibility: a sharp one associated with the substep, and a broader one that occurs at lower pressures. We compare our results to those of a recent study of Ar on graphite.