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Название: Propagation of Sound at Continuous Structural Phase Transitions
Автор: Schwabl F.
Аннотация:
Structural phase transitions of second order can be divided into two groups: (i) distortive phase transitions, with a soft (ultimately overdamped) optic mode, and (ii) elastic phase transitions, with an acoustic soft mode
or no soft phonon for shear or isostructural transitions, respectively.