Anharmonicity near structural phase transitions

1 January 1976

journal article
research article
Published by Taylor & Francis in Ferroelectrics

Vol. 13 (1) , 555-557
https://doi.org/10.1080/00150197608236665

Abstract

The divergence of underdamped-mode linewidth in the vicinity of structural phase transition is treated by the usual anharmonic theory, renormalized to account for the actual temperature dependence of the soft phonon frequencies that enter the damping term. Results are found to fit satisfactorily damping data of A₂ and E modes in quartz.

Keywords

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