Interatomic correlation moments and mean square relative displacements in an anharmonic crystal with the face-centered cubic lattice

Using the correlative method of unsymmetrized self-consistent field we study the dynamical properties of anharmonic crystals, namely, the quadratic correlations between atomic displacements from the equilibrium positions and their mean square relative displacements in anharmonic crystals. In the present paper we calculate these values for a weakly anharmonic crystals with the face-centered cubic lattice in which the nearest neighbors interact. The second order of the method enables one to calculate for this lat-tice the correlations between the nearest, second, third and fourth neighbors. The results are compared with those obtained previously for simplified models. The dependence on the coordination number and on the dimensionality of the lattice is discussed. © World Scientific Publishing Company.

Authors
Zubov V.I. 1, 2 , Pascual M.F.1 , Rodrigues C.G.1
Publisher
World Scientific Publishing Co. Pte Ltd
Number of issue
21
Language
English
Pages
1043-1051
Status
Published
Volume
10
Year
1996
Organizations
  • 1 Depto. de Física, Universidade Federal de Goiás, C.P.131, 74001-970, Goiânia, GO, Brazil
  • 2 Dept. of Theoretical Physics, Peoples' Friendship University, 117198, Moscow, Russian Federation
Date of creation
19.10.2018
Date of change
19.10.2018
Short link
https://repository.rudn.ru/en/records/article/record/805/