Physics – Condensed Matter – Materials Science
Scientific paper
2004-07-16
Physics
Condensed Matter
Materials Science
Scientific paper
10.1088/0953-8984/16/49/L04
We present a model for the leakage current in ferroelectric thin- film capacitors which explains two of the observed phenomena that have escaped satisfactory explanation, i.e. the occurrence of either a plateau or negative differential resistivity at low voltages, and the observation of a Positive Temperature Coefficient of Resistivity (PTCR) effect in certain samples in the high-voltage regime. The leakage current is modelled by considering a diffusion-limited current process, which in the high-voltage regime recovers the diffusion-limited Schottky relationship of Simmons already shown to be applicable in these systems.
Dawber Matthew
Scott James F.
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