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Influence of interface within the composite barrier on the tunneling electroresistance of ferroelectric tunnel junctions with symmetric electrodes |
| Wang Pin-Zhi (王品之)a b, Zhu Su-Hua (朱素华)b, Pan Tao (潘涛)c, Wu Yin-Zhong (吴银忠)b c |
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 SrTiO3 slab and ferroelectric BaTiO3 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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Received: 26 May 2014
Revised: 06 September 2014
Accepted manuscript online:
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PACS:
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73.40.Gk
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(Tunneling)
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77.55.fe
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(BaTiO3-based films)
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77.80.bn
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(Strain and interface effects)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant No. 11274054) and the Open Project of Jiangsu Provincial Laboratory of Advanced Functional Materials, China (Grant No. 12KFJJ005). |
Corresponding Authors:
Wu Yin-Zhong
E-mail: yzwu@cslg.edu.cn
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Cite this article:
Wang Pin-Zhi (王品之), Zhu Su-Hua (朱素华), Pan Tao (潘涛), Wu Yin-Zhong (吴银忠) Influence of interface within the composite barrier on the tunneling electroresistance of ferroelectric tunnel junctions with symmetric electrodes 2015 Chin. Phys. B 24 027301
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