Research theme for competitive and other funds (16)：
2023 - 2026 低次元物質/強誘電体ヘテロ接合を用いた新メカニズム太陽電池の創出
2021 - 2023 強誘電性半導体におけるドーパント誘起超秩序構造の 外場印加下の機能解明
2021 - 2023 pn接合によらない異常光起電力効果に基づく次々世代高効率太陽電池の創製
2019 - 2022 Investigation and controlling of a quasi-dopant effect at a ferroelectric charged surface and interface
2016 - 2019 A breakthrough in ultra-high integration of ferroelectric memories
2016 - 2019 Enhancement of an anomalous photovoltaic effect in ferroelectric thin films for an optical actuator application
2014 - 2016 Artificial induction of domain walls in ferroelectric thin films and controlling of their electronic properties
2013 - 2015 Fabrication of Ferroelectric Nanorod Capacitors for Ultrahigh Integrated FeRAMs
2012 - 2014 Spontaneous polarization in nanosized ferroelectrics and its size dependence
2011 - 2012 Investigation of new-domain-structure-induced functionalities in BiFeO_3 thin films.
2010 - 2012 FABRICATION OF FERROELCTRIC ONE-DIMENSIONAL NANOSTRUCTURES AND CREATION OF FUNCTIONS
2010 - 2011 Preparation of composition-and valence-controlled BiFeO_3 thin films and investigation of leakage mechanism
2009 - 2010 Preparation and characterization of high quality bismuth ferrite based thin films-for improvement of piezoelectric and insulating properties-
2006 - Preparation and Characterization of Multiferroic BiFeO3 Thin Films.
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Papers (71)：
Seiji Nakashima, Koji Kimura, Naohisa Happo, Artoni Kevin R. Ang, Yuta Yamamoto, Halubai Sekhar, Ai I. Osaka, Koichi Hayashi, Hironori Fujisawa. Intermediate multidomain state in single-crystalline Mn-doped BiFeO3 thin films during ferroelectric polarization switching. Scientific Reports. 2024. 14. 14358-1--9
Takeshi Fukuda, Kenji Iimura, Takanori Yamamoto, Ryuki Tsuji, Maito Tanabe, Seiji Nakashima, Naoki Fukumuro, Seigo Ito. Ozone-Assisted Hydrothermal Synthesis Method of Sb-Doped SnO2 Conductive Nanoparticles for Carbon-Free Oxygen-Reduction-Reaction Catalysts of Proton-Exchange-Membrane Hydrogen Fuel Cells. Crystals. 2024. 14. 462-1-20
Kazuki Arima, Seiji Nakashima, Koji Kimura, Koichi Hayashi, Naohisa Happo, Hironori Fujisawa. Local atomic structure of V-doped BiFeO3thin films measured by X-ray fluorescence holography. Japanese Journal of Applied Physics. 2023. 62. SM1017-1-5
Takeshi Asuka, Junpei Ouchi, Hironori Fujisawa, Seiji Nakashima. Crystallization of (Hf, Zr)O2thin films via non-heating process and their application to ferroelectric-gate thin film transistors. Japanese Journal of Applied Physics. 2023. 62. SM1019-1-6
Seiji Nakashima, Tatsuya Ito, Takuo Ohkochi, Hironori Fujisawa. Assessment of polarization-related band modulation at graphene/Mn-doped BiFeO3 interfaces by photoemission electron microscopy. Japanese Journal of Applied Physics. 2022. 61
Electric-field-induced Structural Changes around Fe and Mn Atoms in Mn-doped BiFeO3 Single Crystal Thin Film Measureed by X-ray Fluorescence Holography
(International Conference on Complex Orders in Condensed Matter 2023 (ICCOCM2023) 2023)
Dopant-induced Local Atomic Structure Modulation of Transition-metal-doped BiFeO3 Single Crystal Thin Films Measured by X-ray Fluorescence Holography
(International Conference on Complex Orders in Condensed Matter 2023 (ICCOCM2023 2023)
