铁电性
物理
反铁电性
订单(交换)
凝聚态物理
相图
对称(几何)
相变
相(物质)
结晶学
化学
量子力学
电介质
数学
几何学
财务
经济
作者
P. Tolédano,D. D. Khalyavin
出处
期刊:Physical review
[American Physical Society]
日期:2019-01-14
卷期号:99 (2)
被引量:29
标识
DOI:10.1103/physrevb.99.024105
摘要
Like ferroelectric or ferroelastic phase transitions, antiferroelectric transitions can be predicted by symmetry. This property is illustrated by a theoretical analysis of the complex phase transitions, occurring in the perovskite compounds $\mathrm{PbZr}{\mathrm{O}}_{3}$, $\mathrm{NaNb}{\mathrm{O}}_{3}$, and $\mathrm{PbHf}{\mathrm{O}}_{3}$, which involve the coupling of several order parameters. The symmetry-breaking order parameters associated with the transitions in the three compounds are determined. The antiferroelectric transitions are shown to verify specific symmetry criteria, which consist of the emergence at the local scale of polar site symmetries coinciding with symmorphic subgroups of the antiferroelectric space group. The theoretical temperature--electric-field phase diagram of $\mathrm{PbZr}{\mathrm{O}}_{3}$ involving ferrielectric and ferroelectric phases is worked out.
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