Dynamical properties of a frustrated monolayer of Ar on MgO(100): A neutron-scattering study

Abstract
The paper reports quasielastic and inelastic neutron-scattering (INS) measurements on both the 2×2 commensurate solid and the hexagonal incommensurate structure of monolayer Ar adsorbed on MgO(100). The principal findings are (1) there is reasonable agreement between INS spectra and those calclated for the two phases and (2) there is a liquidlike mobility in the unidirectional disordered phase which results from heating the 2×3 commensurate solid.