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- W1969133477 abstract "The interactions between Bloch orbitals, determined by taking into account the three-centre integrals and by introducing some approximations, allow us to describe the para-ferroelectric phase change of BaTiO 3 and KNbO 3 perovskites from tight-binding band structures. The polarization induced band-edge effects are reproduced and estimated. An interpretation of these phenomena near the transition for T>T c associated to precursor spontaneous polarization in the cubic phase is proposed Etude des interactions entre orbitales de Bloch, determinees en prenant en compte les integrales a 3 centres et en introduisant certaines approximations, pour decrire cette transformation a partir des structures de bandes calculees par la methode des liaisons fortes. Estimation des effets des bords de bandes induits par la polarisation spontanee P s . Interpretation de ces phenomenes au voisinage de la transition pour T>T c par l'existence de P s en phase cubique" @default.
- W1969133477 created "2016-06-24" @default.
- W1969133477 creator A5043589767 @default.
- W1969133477 date "1983-01-01" @default.
- W1969133477 modified "2023-09-26" @default.
- W1969133477 title "Polarisation spontanée et interactions entre orbitales de Bloch au changement de phase para-ferroélectrique de BaTiO3 et KNbO 3" @default.
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- W1969133477 doi "https://doi.org/10.1051/jphyslet:019830044021087700" @default.
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