A discrete four-sublattice model of the lattice instability in A2BX4-type crystals

被引：5

作者：

Ishibashi, Y ^{[1
]}

Janssen, T

机构：

[1] Aichi Shukutoku Univ, Nagakute, Aichi 4801197, Japan

[2] Univ Nijmegen, Inst Theoret Phys, Nijmegen, Netherlands

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2000年 / 69卷 / 12期

关键词：

discrete four-sublattice model; lattice instability; incommensurate phase transition; A(2)BX(4)-type crystal;

D O I：

10.1143/JPSJ.69.3870

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Lattice instability of the A(2)BX(4)-type crystal is studied on the basis of a discrete four sublattice model. The eigenfrequency and the associated eigenvectors of the dynamical matrix at general I; values along the a* axis are analytically given. The relation between the wavenumbers at the incommensurate phase transitions, if any, and the interaction coefficients is clarified.

引用

页码：3870 / 3872

页数：3

共 6 条

[1] COMMENSURATE STRUCTURES AND PINNING ENERGY BASED ON AN ATOMIC MODEL [J].