摘要
考虑到序参量的量子饱和,从朗道相变理论出发,讨论了钛酸钡低温时的相变行为。饱和温度θs用来表征量子影响的程度,与重声子模影响相变的程度相联系。
The low-temperature behavior of BaTiO3 was investigated by using a modification of the standard Landau potential to take account of quantum saturation of the order parameter. The extent of quantum effect was characterized by saturation temperature θs, which is related to the extent of changes of the transition mechanism influence in the hard phonon modes.
出处
《人工晶体学报》
EI
CAS
CSCD
北大核心
2006年第3期580-583,共4页
Journal of Synthetic Crystals
关键词
序参量
自发极化
朗道相变理论
钛酸钡
order parameter
spontaneous polarization
Landau phase transition
BaTiO3
