Effect of temperature on elastic properties of rare gas solids

摘要

We have derived expressions for the first and second order pressure derivatives of the bulk and shear moduli of rare gas solids, including the effect of temperature. The computed results of these expressions, i.e. dK/dP, dC(S)/dP, dC'(44)/dP, d(2)K/dP(2), d(2)Cs/dP(2) and dC'(44)/dP(2), for Ne, Ar, Kr and Xe up to their critical temperature are showing a distinct behaviour as compared to that of the corresponding ionic solids, and are in good agreement with the available experimental and theoretical results. The results are also satisfying Swenson's relation. Thus the present analysis may be useful to obtain information on the third and fourth-order elastic constants, for potential expansions in a lattice dynamics model and also in the study of the equation of state of rare gas solids. (C) 2004 Elsevier B.V. All rights reserved.