Systematic technique for the study of interphase boundaries in structural phase transitions

被引：12

作者：

Hatch, DM

Hu, P

Saxena, A

Barsch, GR

机构：

[1] LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545

[2] PENN STATE UNIV,MAT RES LAB,UNIVERSITY PK,PA 16802

[3] PENN STATE UNIV,DEPT PHYS,UNIVERSITY PK,PA 16802

来源：

PHYSICAL REVIEW LETTERS | 1996年 / 76卷 / 08期

关键词：

D O I：

10.1103/PhysRevLett.76.1288

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present a group theoretic technique based on the concepts of the direction of the order parameter (OF) and the OP isotropy group to study systematically the interphase boundaries in materials undergoing displacive transitions and construct all independent OP gradient invariants, determine primary and secondary OP profiles, domain wall energy, stability, and the phonon dispersion in the vicinity of the soft mode wave vector. We illustrate the technique for an improper ferroelastic O-h(1)-D-4h(17) transition driven by a soft M(5)(-) mode observed in alloys with CsCl structure.

引用

页码：1288 / 1291

页数：4

共 10 条

[1] LANDAU-GINZBURG MODEL OF INTERPHASE BOUNDARIES IN IMPROPER FERROELASTIC PEROVSKITES OF D(18)4H SYMMETRY [J].