Influence of interface within the composite barrier on the tunneling electroresistance of ferroelectric tunnel junctions with symmetric electrodes |
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| Authors: | Wang Pin-Zhi Zhu Su-Hua Pan Tao Wu Yin-Zhong |
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| Institution: | a Physics Department, Soochow University, Suzhou 215006, China;b Physics Department, Changshu Institute of Technology, Changshu 215500, China;c School of Mathematics and Physics, Suzhou University of Science and Technology, Suzhou 215009, China |
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| Abstract: | The interface with a pinned dipole within the composite barrier in a ferroelectric tunnel junction(FTJ) with symmetric electrodes is investigated.Different from the detrimental effect of the interface between the electrode and barrier in previous studies,the existence of an interface between the dielectric SrTiO_3 slab and ferroelectric BaTiO_3 slab in FTJs will enhance the tunneling electroresistance(TER) effect.Specifically,the interface with a lower dielectric constant and larger polarization pointing to the ferroelectric slab favors the increase of TER ratio.Therefore,interface control of high performance FTJ can be achieved. |
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| Keywords: | ferroelectric tunnel junction interface effect tunneling electroresistance |
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