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Temperature- and field-dependent leakage current of Pt/(Ba0.7Sr0.3)TiO3 interface

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6 Author(s)
Yang, Hao ; National Laboratory for Superconductivity, Institute of Physics, Chinese Academy of Sciences, P.O. Box 603, Beijing 100080, China ; Chen, Bin ; Tao, Kun ; Qiu, Xianggang
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Pt/(Ba0.7Sr0.3)TiO3(BST)/YBa2Cu3O7-x(YBCO) capacitors on SrTiO3 substrates were fabricated. The temperature and field dependence of the leakage current of Pt/BST interface were studied in the temperature range from 100 K to 320 K and in an electric field up to 3 MV/cm. For a middle electric field (≪1 MV/cm), the leakage current shows space-charge-limited-current behavior in the temperature range from 100 K to 200 K. In the case of a high electric field (≫1.8 MV/cm), the leakage mechanism is governed by the Fowler–Nordheim tunneling in the whole measured temperature range. © 2003 American Institute of Physics.

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Applied Physics Letters  (Volume:83 ,  Issue: 8 )