We report insights into the interface carrier-confinement-assisted dielectric and electrical properties in atomic-layer-deposited Al2O3/TiO2 nanolaminates (NLs). With progressive thinning of the sublayers down to ∼0.48 nm, the dielectric constant, polarization voltage, bang gap, and interfacial two-dimensional electron gas density of NLs improved due to the enhanced Maxwell–Wagner interfacial polarization and size-dependent quantum confinement effect. The typical current vs voltage (I–V) characteristics of NLs revealed an inherent nanobattery effect and quantum tunneling transport due to the electrical inhomogeneity and carrier confinement across sublayers, respectively. These tunable properties make these NLs a highly suitable dielectric material for various nanoelectronic applications.
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Padhi et al. (2024) studied this question.
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