Journal
SOLID STATE COMMUNICATIONS
Volume 151, Issue 19, Pages 1336-1339Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ssc.2011.06.024
Keywords
Perovskite oxides films; Double Schottky barrier; Nonlinear I-V behavior
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Funding
- National Key Basic Research Program of China [2011CB301802]
- National Natural Science Foundation of China [10874226]
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An enhanced nonlinear current-voltage behavior has been observed in Au nanoparticle dispersed CaCu3Ti4O12 composite films. The double Schottky barrier model is used to explain the enhanced nonlinearity in I-V curves. According to the energy-band model and fitting result, the nonlinearity in Au: CCTO film is mainly governed by thermionic emission in the reverse-biased Schottky barrier. This result not only supports the mechanism of double Schottky barrier in CCTO, but also indicates that the nonlinearity of current-voltage behavior could be improved in nanometal composite films, which has great significance for the resistance switching devices. (C) 2011 Elsevier Ltd. All rights reserved.
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