通常可以通过增强远程库仑相互作用来实现横向光学（TO）声子的软化，这通常可以通过增加天生的有效费用2来增强远程库仑相互作用来实现。然而，它受到去极化效应的苦难3,4，因为诱导的铁电性在降低宿主材料向高密度纳米级电子电子的尺寸下被抑制。Here, we present an alternative route to drive the TO phonon softening by showing that the abnormal soft TO phonon in rocksalt-structured ultrawide-bandgap BeO (ref. 5) is mainly induced by a substantial reduction in the short-range bonding interaction due to the Be–O bond stretching caused by an electron cloud-overlap-induced Coulomb repulsion between two adjacent oxygen ions that are arranged octahedrally around一个非常小的be ion。我们进一步证明了在应变诱导的钙钛矿Bazro3和超薄HFO2和ZRO2膜中鲁棒铁电的出现6,7在晶格匹配的SiO2/Si底物上脱节于短距离键合的稳定性键合的稳定性的稳定性的by型键合的稳定性。这些发现阐明了通过使用离子半径差异，菌株，掺杂和晶格扭曲的化学键来调整化学键，从而开发出一种不含去极化场的超薄膜中铁电性增强的统一理论。