論文

• Shinnosuke Yasuoka, Takao Shimizu, Kazuki Okamoto, Nana Sun, Soshun Doko, Naoko Matsu, Toshikazu Irisaw, Koji Tsunekawa, Alexei Gruverman, Hiroshi Funakubo. Probing of polarization reversal in ferroelectric (Al,Sc)N films using single- and tri-layered structures with different Sc/(Al+Sc) ratio, Adv. Mater. Interfaces, Vol. 2024, No. 2400627, p. 1-8, Oct. 2024.
• Shinnosuke Yasuoka, Takao Shimizu, Kazuki Okamoto, Nana Sun, Soshun Doko, Naoko Matsui, Toshikazu Irisawa, Koji Tsunekawa, Alexei Gruverman, Hiroshi Funakubo. Probing of Polarization Reversal in Ferroelectric (Al,Sc)N Films Using Single- and Tri-Layered Structures With Different Sc/(Al+Sc) Ratio, Advanced Materials Interfaces, Vol. 12, Issue 5, 2400627, Oct. 2024.
• Nana Sun, Kazuki Okamoto, Shinnosuke Yasuoka, Soshun Doko, Naoko Matsui, Toshikazu Irisawa, Koji Tsunekawa, Takayoshi Katase, Tomoyuki Koganezawa, Tomotaka Nakatani, Rosantha Kumara, Osami Sakata, Hiroshi Funakubo. High stability of the ferroelectricity against hydrogen gas in (Al,Sc)N thin films, Appl. Phys. Lett., Vol. 125, pp. 032904, July 2024.
• Nana Sun, Kazuki Okamoto, Shinnosuke Yasuoka, Soshun Doko, Naoko Matsui, Toshikazu Irisawa, Koji Tsunekawa, Takayoshi Katase, Tomoyuki Koganezawa, Tomotaka Nakatani, Rosantha Kumara, Osami Sakata, Hiroshi Funakub. High stability of the ferroelectricity against hydrogen gas in (Al,Sc)N thin films, Appl. Phys. Lett., Vol. 125, No. 032904, p. 1-7, June 2024.

国際会議発表 (査読有り)

• Soshun Doko, Naoko Matsui, Toshikazu Irisawa, Koji Tsunekawa, Nana Sun, Yoshiko Nakamura, Kazuki Okamoto, Hiroshi Funakubo. Thickness Dependence of Ferroelectricity for Thin (Al0.9Sc0.1)N-based FeRAM, 2024 IEEE International Meeting for Future of Electron Devices, Kansai (IMFEDK 2024), R09, Nov. 2024.
• Nana Sun, Kazuki Okamoto, Shinnosuke Yasuoka, Soshun Doko, Naoko Matsui, Toshikazu Irisawa, Koji Tsunekawa, Hiroshi Funakubo. High stability of the ferroelectricity against hydrogen gas in (Al,Sc)N thin films, 2024 International Conference on Solid State Devices and Materials (SSDM 2024), B-4-01, Sept. 2024.
• Nana Sun, Kazuki Okamoto, Shinnosuke Yasuoka, Soshun Doko, Naoko Matsui, Toshikazu Irisawa, Koji Tsunekawa, Hiroshi Funakubo. Stable ferroelectric property at high temperature under hydrogen gas in (Al, Sc)N thin films, The Meeting on Ferroelectric Materials and Their Applications (FMA41), 15am-08, June 2024.

国際会議発表 (査読なし・不明)

• Nana Sun, Kazuki Okamoto, Shinnosuke Yasuoka, Soshun Doko, Naoko Matsui, Toshikazu Irisawa, Koji Tsunekawa, Hiroshi Funakubo. Stable high-switching speed in (Al,Sc)N films heat-treated under H2 atmosphere, 37th International Microprocesses and Nanotechnology Conference, Nov. 2024.
• Soshun Doko, Naoko Matsui, Toshikazu Irisawa, Nana Sun, Yoshiko Nakamura, Kazuki Okamoto, Hiroshi Funakubo, Koji Tsunekawa. Thickness Dependence of Ferroelectricity for Thin (Al0.9Sc0.1)N-based FeRAM, The 2024 International Meeting for Future of Electron Devices, Kansai, Nov. 2024.
• Nana Sun, Kazuki Okamoto, Shinnosuke Yasuoka, Soshun Doko, Naoko Matsui, Toshikazu Irisawa, Koji Tsunekawa, Hiroshi Funakubo. Stable high-switching speed in (Al,Sc)N films heat-treated under H2 atmosphere, MNC 2024, 15C-2-2, Nov. 2024.

国内会議発表 (査読なし・不明)

• Nana Sun, Kazuki Okamoto, Shinnnosuke Yasuoka, Soshun Doko, Naoko Matsui, Toshikazu Irisawa, Koji Tsunekawa, Hiroshi Funakubo. Stable ferroelectric property at high temperature under nydrogen gas in (Al, Sc)N thin films, 第41回強誘電体会議, June 2025.
• 道古宗俊, 松井尚子, 入澤寿和, 恒川孝二, Nana Sun, 中村美子, 岡本一輝, 舟窪浩. 薄膜化した (Al1-xScx)N膜における結晶性・強誘電特性のSc組成比依存性, 第72回応用物理学会春季学術講演会, Mar. 2025.
• Nana SUN, Atsuhiro Tamai, Kazuki Okamoto, Hideaki Adachi, Isaku Kanno, HIROSHI FUNAKUBO. Switching kinetics in wurtzite Zn(Ce,Mn)O ferroelectric films, 第72回応用物理学会春季学術講演会, Mar. 2025.
• 道古 宗俊, 松井 尚子, 入澤 寿和, 恒川 孝二, Nana Sun, 中村 美子, 岡本 一輝, 舟窪 浩. 薄膜化した (Al1-xScx)N膜における結晶性・強誘電特性のSc組成比依存性, 第72回応用物理学会春季学術講演会, 15a-K503-4, Mar. 2025.
• Nana Sun, Kazuki Okamoto, Soshun Doko, Naoko Matsui, Toshikazu Irisawa, Koji Tsunekawa, Hiroshi Funakubo. Effects of thickness scaling on switching kinetics in (Al,Sc)N ferroelectric films, The 72nd JSAP Spring Meeting, 15a-K503-2, Mar. 2025.
• Nana Sun, Kazuki Okamoto, Soshun Doko, Naoko Matsui, Toshikazu Irisawa, Koji Tsunekawa, Hiroshi Funakubo. Effects of thickness scaling on switching kinetics in (Al,Sc)N ferroelectric films, 第72回応用物理学会春季学術講演会, Mar. 2025.
• 舟窪浩, 安岡慎之介, 岡本一輝, SUN Nana, 白石貴久, 上原雅人, 清水荘雄. ウルツ構造を有する窒化物薄膜の結晶構造と強誘電性, 第34回日本MRS年次大会, Dec. 2024.
• Yu-Ta Chen, Kazuki Okamoto, Kohei Shimonosono, Nachi Chaya, Nana Sun, Miki Nakahata, Wakiko Yamaoka, Yukari Inoue, Hiroshi Funakubo. Effect of Ce/(Hf+Ce) ratio on ferroelectric and piezoelectric properties of thick xCeO2-(1-x)HfO2 films deposited by sputtering method without substrate heating, 第44回電子材料研究討論会, Nov. 2024.
• Nana Sun, Kazuki Okamoto, Shinnosuke Yasuoka, Soshun Doko, Naoko Matsui, Toshikazu Irisawa, Koji Tsunekawa, Hiroshi Funakubo. High stability of the ferroelectricity against hydrogen gas in (Al,Sc)N thin films, SSDM2024 (2024 International Conference on Solid State Devices and Materials), Sept. 2024.
• 道古宗俊, 松井尚子, 入澤寿和, 恒川孝二, Nana Sun, 中村美子, 岡本一輝, 舟窪浩. FeRAM向け (Al,Sc)N膜における強誘電特性の膜厚依存性評価, 第85回応用物理学会秋季学術講演会, Sept. 2024.
• 道古 宗俊, 松井 尚子, 入澤 寿和, 恒川 孝二, Nana Sun, 中村 美子, 岡本 一輝, 舟窪 浩. FeRAM向け (Al,Sc)N膜における強誘電特性の膜厚依存性評価, 第85回応用物理学会秋季学術講演会, 18a-B3-5, Sept. 2024.
• Nana SUN, Kazuki Okamoto, Shinnosuke Yasuoka, Naoko Matsui, Toshikazu Irisawa, Koji Tsunekawa, Soshun Doko, Hiroshi Funakubo. High stability of ferroelectricity against hydrogen gas in (Al,Sc)N thin films, 第71回応用物理学会春季学術講演会, Mar. 2024.
• Nana Sun, Kazuki Okamoto, Shinnosuke Yasuoka, Naoko Matsui, Toshikazu Irisawa, Koji Tsunekawa, Soshun Doko, Hiroshi Funakubo. High stability of ferroelectricity against hydrogen gas in (Al,Sc)N thin films, The 71st JSAP Spring Meeting, 24a-12H-3, Mar. 2024.

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