Appropriate Value of Permittivity for Depolarization Field and Universal Instability of Insulating Ferroelectric Phase in Single-Domain State
Appropriate Value of Permittivity for Depolarization Field and Universal Instability of Insulating Ferroelectric Phase in Single-Domain State
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单畴态绝缘铁电相去极化场的适当介电常数和普遍不稳定性
DOI：
10.1080/00150193.2010.484328
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发表时间：
2010
期刊：
影响因子：
0.8
通讯作者：
Yukio Watanabe
中科院分区：
文献类型：
--
作者：
Yukio Watanabe
我们重新定义了退极场的介电常数，证明了在大多数情况下，退极场的介电常数应该是1，并给出了退极场的正确表达式。在此基础上，对经历一级相变的铁电体的一般考虑表明，如果没有非介电屏蔽机制，自由存在的二维铁电相不可能存在于单一的磁区状态。
We redefine the permittivity for the depolarization field and show that in most situations the permittivity for depolarization field should be unity, and show a proper expression for depolarization field. Based on this expression a generic consideration of ferroelectrics undergoing the first order transition shows that free standing two-dimensional ferroelectric phase cannot exist in a single domain state without a non-dielectric screening mechanism.