A Discrete Two-Sublattice Model of the Lattice Instability in A2BX4-Type Crystals

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概要

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• The discrete four-sublattice model previously proposed for reproducing the lattice instabilities in A2BX4-type crystals is reduced to a two-sublattice model. Eigenfrequencies and the associated eigenvectors of the dynamical matrix are given analytically for general k values. The conditions on the interaction parameters for the appearance of incommensurate phase transitions are clarified.

• 2001-09-15

著者

• Janssen Ted

  Theoretical Physics University Of Nijmegen

• Ishibashi Yoshihiro

  School Of Communications Aichi Shukutoku University

• Janssen Ted

  Theoretical Physics, University of Nijmegen, Nijmegen, The Netherlands

関連論文

• A Discrete Two-Sublattice Model of the Lattice Instability in A_2BX_4-Type Crystals
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• On the Lattice Instability in Incommensurate Phase Transition of K_2SeO_4
• A Discrete Two-Sublattice Model of the Lattice Instability in A2BX4-Type Crystals
• On the 74 K Phase Transition in Hexagonal Barium Titanate

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