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The negative capacitance (NC) effect is now attracting a great deal of attention in work towards low‐power operation of field effect transistors and extremely large capacitance density in dynamic random access memory. However, to date, observation of the NC effect in dielectric/ferroelectric bilayer capacitors has been limited to the use of epitaxial ferroelectric thin films based on perovskite crystal...
Metal-insulator-semiconductor capacitors were fabricated with sputtered ZnO and atomic layer deposited HfO 2 as the semiconductor and gate dielectric layers, respectively. From the capacitance–voltage measurements, it was confirmed that pre-deposition annealing of the sputtered ZnO layer at 300°C in air greatly decreased the interfacial trap density (∼2×10 12 cm −2 eV −1...
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