Electric permittivity in gas atoms by the theory of quantum optics 从量子光学理论探讨气体原子的电极化率
The increase of the thickness of the non - polarization slab will decrease the average polarization and the susceptibility of the multilayer 杂质层的增厚会导致多层膜的极化和介电极化率的降低。
For the first time , we investigate the effects of the non - polarization layer on the polarization and the dielectric susceptibility of a ferroelectric multilayer 我们首次研究了无极化杂质层对铁电多层膜极化和介电极化率的作用。
It is found that the pyroelectric coefficient and susceptibility increase with the decrease of the magnitude of the long - range interaction and the interfacial coupling when the temperature is lower than the phase transition temperature 我们发现,在相变温度以下,随着双层薄膜的界面耦合的减弱,铁电双层薄膜的热电系数和介电极化率增加。
We also find that the strong long - range interaction , the large transverse field and weak interfacial coupling can lead to the disappearance of some of the peaks of the pyroelectric coefficient and susceptibility of the ferroelectric bilayer . we believe that it is the reason why these phenomena always take place in the experimental studies 我们还发现,较强的长程相互作用,较大的横场以及相对较弱的界面耦合作用将会导致铁电双层薄膜的热电系数和介电极化率的某些峰消失,这可以用来解释在实验中常常观测不到热释电系数和介电极化率的某些峰值的原因。