Advantage of the structure and the electrical properties of epitaxial ultra-thin zirconia gate dielectrics

作者: Takanori Kiguchi , Naoki Wakiya , Junzo Tanaka , Kazuo Shinozaki

DOI: 10.1016/J.MSEB.2007.09.037

关键词: Monoclinic crystal systemTetragonal crystal systemEpitaxyHigh-resolution transmission electron microscopyDielectricOptoelectronicsHysteresisMaterials scienceTransmission electron microscopyThin film

摘要: Abstract For this study, the authors fabricated non-doped 0 0 1 epitaxial ZrO 2 gate dielectrics with small density of extrinsic defects and charges in size effect. Wide-angle X-ray reciprocal space mapping high-resolution transmission electron microscope (HRTEM) analyses showed many 90° 180° domains. The planes nearly align out-of-plane direction for 17-nm thin films. On other hand, nanoscale monoclinic phase precipitated coherently a tetragonal matrix 3-nm Capacitance–voltage ( C – V ) measurements suggest that curve film has charge-injection type hysteresis. width is 26 mV less than 2 mV ultra-thin film.

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