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. 2015 Nov 3;5:15965. doi: 10.1038/srep15965

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(a) Schematic diagram and (b) TEM image of the TiN/Ta₂O₅/Ta/TaN device. Ta₂O₅ (0.5 nm) device, and (d) Ta₂O₅ (1.5 nm) device. Insets show the linear I-V plot. Scanning transmission electron microscopy (STEM) high angle annular dark field (HAADF) images of (c) 0.5 nm-thick device and (d) 2.0nm-thick device.