We report regions of long-ranged correlations parallel to a surface as revealed in the calculation of the correlation functions and density profile for a vapor adsorbed on a solid substrate. The method underlying the calculations uses the modified hypernetted-chain equation in conjunction with the first Yvon-Born-Green equation.

• Received 18 August 1981

DOI:https://doi.org/10.1103/PhysRevB.25.1366