Intrinsic asymmetric ferroelectricity induced giant electroresistance in ZnO/BaTiO₃ superlattice

Abstract

We combine the piezoelectric wurtzite ZnO and the ferroelectric (111) BaTiO3 as a hexagonal closed-packed structure and report a systematic study on the ferroelectric behavior induced by the interface and the transport properties between electrodes.

Giant tunnel resistance effect in (SrTiO3)2/(BaTiO3)4/(CaTiO3)2 asymmetric superlattice with enhanced polarization

“…27 In addition to enhancing polarization, introducing intrinsic asymmetric ferroelectricity into the ferroelectric layer is also a way to enhance the TER effect in recent years. 28,29 In FTJ, the asymmetric ferroelectricity will aggravate the asymmetry of depolarization field, which will increase the difference of barrier height in ON/OFF state, and will increase the ON/OFF ratio. Here we have chosen the (SrTiO 3 ) x /(BaTiO 3 ) y /(CaTiO 3 ) z (SBC) threecomponent superlattice as our research subject.…”