ORIENTATIONAL EPITAXY IN ADSORBED MONOLAYERS

Bond-orientational order in Langmuir-Blodgett surfactant monolayers

Cadmium stearate surfactant molecules assembled into monolayers by the Langmuir-Blodgett method exhibit bond-orientational order. Bond-orientational correlations extend over macroscopic distances on the order of a millimeter while translational correlations decay on a scale of tens of angstroms. The long axis of the molecules are tilted away from the surface normal but the tilt direction is dis...

Nonequilibrium orientational patterns in two-component Langmuir monolayers.

A model of a phase-separating two-component Langmuir monolayer in the presence of a photoinduced reaction interconverting two components is formulated. An interplay between phase separation, orientational ordering, and reaction is found to lead to a variety of nonequilibrium self-organized patterns, both stationary and traveling. Examples of the patterns, observed in numerical simulations, incl...

Orientational Ordering in Monolayers of Ortho-para Hydrogen

We discuss orientational ordering in monolayers of solid hydrogen in view of recent experimental findings in NMR studies of (ortho)c-(para)1−c-hydrogen mixtures on boron nitride substrate. Analysis of the temperature-concentration behavior for the observed NMR frequency splitting is given on the basis of a two-dimension (J = 1)c-(J = 0)1−c-rotor model with the quadrupolar coupling constant Γ0 =...

Phonons and librons in nitrogen monolayers adsorbed on graphite.

Incommensurate and commensurate phases in adsorbed monolayers: ground state properties

The ground state properties of incommensurate films of domain wall structure formed on the (100) plane of face centered cubic crystals are studied by Monte Carlo simulation. The wall energies, wall structure and the wall-wall interaction are determined for domain walls occurring in films which form the c(2×2) registered structure. The systems characterized by different strength and corrugation ...