Gyrotropic phase transitions
Gyrotropic phase transitions
复制标题
陀螺相变
DOI：
10.1088/0022-3719/11/12/012
复制
发表时间：
1978
期刊：
影响因子：
--
通讯作者：
F. Smutný
中科院分区：
文献类型：
--
作者：
Č. Koňák;V. Kopský;F. Smutný
结构（旋光）相变从光学非活性的光学活性（旋光）阶段进行了分析，为超导材料。对于那些与单个REP（不可约或物理不可约表示）相关联的等translational回旋相变，群论分析的下列基本结果被收集起来：例如宏观跃迁参数、回转张量的自发分量、在跃迁处新出现的极化和变形张量、微弱指数、微弱相互作用和开关力。一个简单的表征的铁电相的畴结构给出了这些张量。
Structural (gyrotropic) phase transitions from optically inactive to optically active (gyrotropic) phases are analysed for nonmagnetic materials. The following basic results of group theoretical analysis are gathered for those equitranslational gyrotropic phase transitions which are associated with a single REP (irreducible or physically irreducible representations): e.g. the macroscopic transition parameter, the spontaneous components of the gyration tensor, the polarisation and deformation tensors newly onsetting at the transition, the indices of faintness, faint interactions, and switching forces. A simple characterisation of the domain structure of the ferroic phase is given in terms of these tensors.