Étude théorique de la dynamique du réseau de PbTiO3 dans la phase quadratique

6533b7cffe1ef96bd12597ed

RESEARCH PRODUCT

Étude théorique de la dynamique du réseau de PbTiO3 dans la phase quadratique

subject

Lattice dynamics Physics Force constant SHELL model General Physics and Astronomy Thermodynamics General Chemistry

description

Resume La dynamique du reseau du titanate de plomb PbTiO 3 est etudiee en phase quadratique a l'aide d'un modele a coquille tenant compte des polarisabilites electroniques des ions de la maille elementaire et des interactions a longue et a courte portee. Les resultats de nos calculs mettent en evidence le role important joue par l'anisotropie de la polarisabilite electronique de l'oxygene. Il est montre aussi que les courbes de dispersion des phonons calculees dans la premiere zone de Brillouin sont en bon accord avec l'experience.

year	journal	country	edition	language
1999-09-01	Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Astronomy

https://doi.org/10.1016/s1287-4620(00)87020-9

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