MECHANISM OF THE FERROELASTIC TRANSITION OF BIVO4

被引：106

作者：

PINCZUK, A ^{[1
]}

WELBER, B ^{[1
]}

DACOL, FH ^{[1
]}

机构：

[1] IBM CORP,THOMAS J WATSON RES CTR,YORKTOWN HTS,NY 10598

来源：

SOLID STATE COMMUNICATIONS | 1979年 / 29卷 / 07期

关键词：

D O I：

10.1016/0038-1098(79)90347-8

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

BiVO4 has a pure ferroelastic transition at Tc = 528°K and atmospheric pressure. We elucidated the mechanism of this transition by studying the q≈0 soft optical phonon, with the symmetry of the ferroelastic strain, under large hydrostatic prèssures at room temperature. A free-energy analysis, including the optical-acoustical phonon couplings, shows that the transition is driven by the q≈0 soft optical phonon. © 1978.

引用

页码：515 / 518

页数：4

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