It is predicted that the long-range electrostatic screening by the incomplete charge compensation in the real electrodes and the surface field originated from the short-range coupling of the atoms at super-lattice/ electrode interface can significantly enhance the critical thickness where ferroelectric-paraelectric phase transition occurs. 理论预测,真实电极中由于电荷的不完全补偿导致的长程静电屏蔽和超晶格与电极交界面原子间的短程耦合作用产生的表面场能显著地提高铁电一顺电相变对应的临界厚度。