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Leakage current of Pt/(Ba0.7Sr0.3)TiO3 interface with dead layer

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8 Author(s)
Chen, B. ; National Laboratory for Superconductivity, Institute of Physics and Center for Condensed Matter Physics, Chinese Academy of Sciences, P.O. Box 603, Beijing 100080, China ; Yang, H. ; Miao, J. ; Zhao, L.
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Leakage current of Pt/(Ba0.7Sr0.3)TiO3 (BST)/YBa2Cu3O7-δ capacitors on a (001) SrTiO3 substrate was studied. By modeling a low-dielectric constant layer, a so-called dead layer, between the Pt/BST interface as a parasitic capacitor in series with the bulk layer capacitor, the leakage current of Pt/BST interface was well analyzed based on the modified Schottky emission equation. Furthermore, a two-step schematic energy band diagram is proposed to explain the carrier transport through the Pt/BST interface.

Published in:

Journal of Applied Physics  (Volume:97 ,  Issue: 2 )

Date of Publication:

Jan 2005

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