Atomic vibrations in orientationally disordered systems. I. A two dimensional model
- 25 May 1972
- journal article
- Published by IOP Publishing in Journal of Physics C: Solid State Physics
- Vol. 5 (10) , 1017-1027
- https://doi.org/10.1088/0022-3719/5/10/006
Abstract
The atomic vibrational properties of a two dimensional model exhibiting orientational disorder, similar to that in hexagonal ice I, are studied by numerical methods. At low frequencies the modes are similar to those in a regular form of the model, and are wavelike in character. At middle frequencies the modes are significantly, and at high frequencies strongly, spatially localized. The centres of localization are linked to geometrical features arising from the orientational disorder.Keywords
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