铁电性
材料科学
凝聚态物理
铁磁性
电介质
量子隧道
铁磁材料性能
双层
极化(电化学)
自旋极化
电子
光电子学
磁化
磁场
物理
化学
膜
生物化学
物理化学
量子力学
作者
Yihao Wang,Peng Zhou,Jiaolian Liu,Zhijun Ma,Tianjin Zhang
摘要
Electron transport in ferroelectric tunnel junctions (FTJs) with a three-step-like barrier combining a dielectric, ferromagnetic, and ferroelectric was investigated theoretically. A significant enhanced tunneling electroresistance effect was observed as compared to traditional FTJs with a bilayer composite barrier. The spin polarization also could be enhanced in a certain orientation of ferroelectric polarization. A metal/dielectric/ferromagnetic/ferroelectric/metal FTJ with a large ferromagnetic thickness is preferred for the optimal performance. The ferroelectricity in the ferroelectric layer has a weak modulation effect on the spin polarization. This work provides a way to enhance the performance of FTJs and/or to control the spin-polarized electronic transport by structure engineering.
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