Microscopic Model of NaNBased on Reorientations and Translations
- 26 January 1981
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 46 (4), 291-294
- https://doi.org/10.1103/physrevlett.46.291
Abstract
Starting from an atomistic sterical hindrance potential, translational and orientational motion of the N group in the deformable lattice are described. The reorientations of the N group in the paraelectric phase occur essentially by rotations around the crystallographic axis, in agreement with slow or zero-frequency experiments. It is explained why high-frequency optical methods lead to the incorrect conclusion that reorientations take place around the axis. The collective interaction of translations and rotations is discussed.
Keywords
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