hysteresis characteristics of a Pt/BTO/ZnO/Pt heterojunction. The bias voltage was swept as . Arrows indicate the direction of the sweep. The is 1, 2, 3, 4, and 5 V. For clarity each curve, starting from 2 V is shifted successively by one order of magnitude. The inset shows the schematic of Pt/BTO/ZnO/Pt heterostructure.
The loops of our BTO/ZnO heterostructure at different temperatures. For clarity, the curve at is shifted upward by one (two) order of magnitude.
The top panel of the figure shows the leakage current measurements as a function of time and applied voltage. The lower panel of the figure shows the voltage pulse sequence. The −2 and 0 V pulses were applied for 5 min, and the 5 and −5 V pulse were applied for one second each.
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