The effect of long-range three-body forces on the elastic constants of the inert gas solids at the absolute zero
- 1 December 1968
- journal article
- Published by IOP Publishing in Journal of Physics C: Solid State Physics
- Vol. 1 (6) , 1505-1514
- https://doi.org/10.1088/0022-3719/1/6/306
Abstract
The elastic constants C11, C12 and C44 of neon, argon, krypton and xenon are calculated at the absolute zero. One calculation is made assuming only two-body interactions. A second calculation is then presented in which the triple-dipole interaction of Axilrod and Teller is included. It is shown that the quantity B = (C44-C12/C12, which is always positive when calculated with only two-body forces, is reduced when the triple-dipole interaction is included. In the cases of argon, krypton and xenon B in fact becomes negative. It should be possible to test this experimentally and if B were found negative this would provide strong evidence for the existence of three-body forces.Keywords
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