A DYNAMIC-MODEL OF THE STRUCTURAL PHASE-TRANSITION IN LA2CUO4

被引：2

作者：

PLAKIDA, NM

KRASAVIN, SE

机构：

[1] Joint Institute for Nuclear Research, Dubna

来源：

PHYSICS LETTERS A | 1991年 / 158卷 / 6-7期

关键词：

D O I：

10.1016/0375-9601(91)90987-J

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A microscopic model of anharmonic lattice dynamics for La2-xM(x)CuO4 crystals is proposed to describe the soft tilting mode and its interaction with strains. The free energy for the model is calculated and the structural phase transitions D4h17 --> D2h18 --> D4h16 are considered. A strong x-dependence of anharmonic constants is proposed, especially for apical oxygen displacements.

引用

页码：313 / 317

页数：5

共 20 条

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