OPTIKA I SPEKTROSKOPIYA / Optics and Spectroscopy.
MEZHDUNARODNAYA KNIGA / Федеральное государственное бюджетное учреждение науки Физико-технический институт им. А.Ф. Иоффе Российской академии наук.
Vol. 74.
1993.
P. 257-265
A correlative method of unsymmetrized self-consistent field is utilized to study the interatomic correlations in anharmonic crystals. Using the statistical perturbation theory up to second order the expression for binary correlations is derived. Corresponding diagrams are constructed and classified. As a simple application, the correlation moments are calculated for the one-dimensional model.