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Fig. 3


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Temperature-dependent breakdown behaviour for continuous (solid lines) and intermittent (dashed lines) voltage sweeps. The coloured arrows at the bottom indicate the limits of the linear regions of the INT data in the Fowler-Nordheim (FN) and Poole-Frenkel (PF) plots (only lower limit for FN). Inset: Breakdown voltage as V (− 40 mA/cm2) as a function of temperature.

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