This article is cited in 12 papers

Lattice dynamics

Quadrupole deformation of electron shells in the lattice dynamics of compressed rare-gas crystals

E. P. Troitskaya^a, Val. V. Chabanenko^a, I. V. Zhikharev^ab, E. E. Gorbenko^b, E. A. Pilipenko<sup>a

a</sup> Galkin Donetsk Institute for Physics and Engineering, Donetsk
^b Lugansk Taras Shevchenko National University

Abstract: The lattice dynamics of rare-gas crystals has been constructed taking into account the deformation of electron shells of the atoms of the dipole and quadrupole types, depending on the displacement of the nuclei. The obtained equations of lattice vibrations have been investigated in the long-wavelength approximation. The role played by the three-body interaction and the deformation of the electron shells in the violation of the Cauchy relation has been discussed. The calculated Birch elastic moduli for Xe and deviations from the Cauchy relation are in good agreement with the available experimental data over a wide range of pressures.

Received: 05.07.2011
Accepted: 01.11.2011

 English version: Physics of the Solid State, 2012, 54:6, 1254–1262

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