Modeling of Radial Distribution Functions of Liquid Argon Film Confined Between Diamond Surfaces

The one of main structural characteristics of liquids is the radial distribution function; it specifies the change in the number of atoms in the liquid (or density) depending on the distance from the center of a given atom. Note that in a liquid, for any particular atom at a given moment of time, such a distribution of neighbors will be somehow different. However, after averaging over all “central” atoms (or around one atom, but over a long time), a function is obtained that carries information about the characteristic mutual arrangement of atoms in space for a given system. We can say that it characterizes the “probability” of finding an atom at a defined distance from a given atom. There is a clear peak for argon corresponding to the nearest neighbors, and subsequent damped oscillations, which is typical for all simple liquids. Liquid argon was one of the first objects of application of the molecular dynamics method in statistical physics. The interaction of argon atoms is well described by the Lennard-Jones potential.