array(2) { ["lab"]=> string(3) "859" ["publication"]=> string(5) "15326" } Wake-up effect in Hf<sub>0.4</sub>Zr<sub>0.6</sub>O<sub>2</sub> ferroelectric thin-film capacitors under a cycling electric field - Novel Semiconductor Devices and Reliability Lab | LabXing

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Wake-up effect in Hf<sub>0.4</sub>Zr<sub>0.6</sub>O<sub>2</sub> ferroelectric thin-film capacitors under a cycling electric field

2022
期刊 Chinese Physics B
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We examined the wake-up effect in a TiN/Hf0.4Zr0.6O2/TiN structure. The increased polarization was affected by the cumulative duration of a switched electric field and the single application time of the field during each switching cycle. The space-charge-limited current was stable, indicating that the trap density did not change during the wake-up. The effective charge density in the space-charge region was extracted from capacitance–voltage curves, which demonstrated an increase in free charges at the interface. Based on changing characteristics in these properties, the wake-up effect can be attributed to the redistribution of oxygen vacancies under the electric field.

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