J. Phys. Colloques
Volume 42, Numéro C6, Décembre 1981International Conference on Phonon Physics
|Page(s)||C6-773 - C6-775|
J. Phys. Colloques 42 (1981) C6-773-C6-775
ROLE OF PHONONS IN STRUCTURAL PHASE TRANSITIONS OF TRANSITION METAL DICHALCOGENIDESK. Motizuki, Y. Yoshida et Y. Takaoka
Department of Material Physics, Faculty of Engineering Science, Osaka University, Toyonaka 560, Japan
To study the lattice instability of 1T-TiSe2, phonon dispersion curves are calculated as functions of temperature by taking into account the effective ion-ion interactions caused by electron-lattice interaction. From the standpoint of the softening of phonon frequency we conclude that one of the transverse modes at the L point freezes as the distortion at the phase transition.