Lattice-Dynamical Study of the-Phase Transition of Quartz: Soft-Mode Behavior and Elastic Anomalies
- 24 March 1997
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 78 (12) , 2413-2416
- https://doi.org/10.1103/physrevlett.78.2413
Abstract
The mechanism of the α-β phase transition of quartz is investigated within the framework of a lattice-dynamical model using the pair-wise potential by Tsuneyuki et al. [Phys. Rev. Lett. 61, 869 (1988)]. The model well describes this effect and shows that the related phenomena (the soft-mode behavior and the negative Poisson ratios) can be mainly attributed to the sensitivity of the potential surface to volume extension.Keywords
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