›› 2015, Vol. 24 ›› Issue (2): 27301-027301.doi: 10.1088/1674-1056/24/2/027301

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Influence of interface within the composite barrier on the tunneling electroresistance of ferroelectric tunnel junctions with symmetric electrodes

王品之a b, 朱素华b, 潘涛c, 吴银忠b c   

  1. 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
  • 收稿日期:2014-05-26 修回日期:2014-09-06 出版日期:2015-02-05 发布日期:2015-02-05
  • 基金资助:
    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).

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   

  1. 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
  • Received:2014-05-26 Revised:2014-09-06 Online:2015-02-05 Published:2015-02-05
  • Contact: Wu Yin-Zhong E-mail:yzwu@cslg.edu.cn
  • Supported by:
    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).

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摘要： 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.

关键词: ferroelectric tunnel junction, interface effect, tunneling electroresistance

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.

Key words: ferroelectric tunnel junction, interface effect, tunneling electroresistance

中图分类号:  (Tunneling)

  • 73.40.Gk
77.55.fe (BaTiO3-based films) 77.80.bn (Strain and interface effects)