論文

• Jiayi Tang, Okkyun Seo, Jaemyung Kim, Ibrahima Gueye, L. S. R. Kumara, Ho Jun Oh, Wan-Gil Jung, Won-Jin Moon, Yong Tae Kim, Satoshi Yasuno, Tappei Nishihara, Mamoru Yoshimoto, Akifumi Matsuda, Osami Sakata. Selective phase growth of ultra-smooth Ti2O3 and TiO2 thin films at low growth temperature controlled by the oxygen partial pressure, Applied Surface Science Advances, Elsevier, Volume 26, Feb. 2025.  公式リンク  
  
• 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.
• Yanna Chen, Osami Sakata, Hiroyuki Morita, Akifumi Matsuda, Fanhao Jia, Okkyun Seo, Loku Singgappulige Rosantha Kumara, Toshiaki Ina, Eiichi Kobayashi, Jaemyung Kim, Chulho Song, Satoshi Hiroi, Natalia Palina, Yanfang Lou, Wei Ren, Mamoru Yoshimoto. Electronic states of gallium oxide epitaxial thin films and related atomic arrangement, Applied Surface Science, Elsevier BV, 578, 151943, Mar. 2022.  公式リンク  
  
• Loku Singgappulige Rosantha Kumara, Kyohei Ishikawa, Keisuke Ide, Hideo Hosono, Toshio Kamiya, Osami Sakata. Local Structure Properties of Hydrogenated and Nonhydrogenated Amorphous In-Ga-Zn-O Thin Films Using XAFS and High-Energy XRD, J. Phys. Chem. C, 125, 13619–13628, June 2021.
• Yanna Chen, Osami Sakata, Ryosuke Yamauchi, Anli Yang, LOKU SINGGAPPULIGE, Rosantha Kumara, Chulho Song, Natalia Palina, Munetaka Taguchi, Yoshio Katsuya, Hiroshi Daimon, Akifumi Matsuda, MAMORU YOSHIMOTO. Lattice distortion and electronic structure of magnesium-doped nickel oxide epitaxial thin films, Physical Review B, American Physical Society, 95, 245301, June 2017.  公式リンク  
  
• Anli Yang, Osami Sakata, Ryosuke Yamauchi, LOKU SINGGAPPULIGE, Rosantha Kumara, Chulho Song, Yoshio Katsuya, Akifumi Matsuda, Mamoru Yoshimoto. Atomic disorder of Li_0.5Ni_0.5O thin films caused by Li doping: estimation from X-ray Debye-Waller factors, Journal of Applied Crystallography, International Union of Crystallography, Volume 48, # 6, Page 1896-1900, Dec. 2015.  公式リンク  
  

国際会議発表 (査読有り)

• Loku Singgappulige Rosantha Kumara, Sakura Yoshikawa, Atsushi Shimizu, Linwei Li, Takayoshi Katase, Seo Okkyun, Takeshi Watanabe, Masugu Sato, Osami Sakata, Atsushi Fukuchi, Toshio Kamiya. Atomic Scale and Electronic Structure Characterization of Amorphous Tantalum Oxide Thin Films via Synchrotron X-ray Techniques, AsCA2024, Dec. 2024.

国内会議発表 (査読なし・不明)

• 中畑美紀, 岡本一輝, 石濱圭佑, 清水荘雄, 小金澤智之, Rosantha Kumara, 仲谷友孝, 池田理, 坂田修身, 山田智明, 舟窪浩. (100)/(001)配向正方晶Pb(Zr,Ti)O3膜における圧電応答の周波数依存性, 第85回応用物理学会秋季学術講演会, Sept. 2024.
• Miki Nakahata, Kazuki Okamoto, Takao Shimizu, Keisuke Ishihama, Tomoyuki Koganezawa, Rosantha Kumara, Tomotaka Nakatani, Osamu Ikeda, Osami Sakata, Tomoaki Yamada, Hiroshi Funakubo. Impact of domain switching to lattice deformation under applying an electric field in tetragonal (100)/(001)-oriented Pb(Zr,Ti)O3 epitaxial films, JKC-FE14 (The 14th Japan-Korea Conference on Ferroelectricity), Aug. 2024.
• Yanna Chen, Osami Sakata, Ryosuke Yamauchi, Anli Yang, LOKU SINGGAPPULIGE, Rosantha Kumara, Chulho Song, Natalia Palina, Munetaka Taguchi, Yoshio Katsuya, Hiroshi Daimon, Akifumi Matsuda, MAMORU YOSHIMOTO. Lattice distortion and electronic structures of epitaxial Mg_xNi_1-xO thin films, The 30th Annual Meeting of the Japan Society for Synchrotron Radiation Reaearch and Synchrotron radiation Symposium, Nov. 2016.
• 坂田修身, Yanna Chen, Anli Yang, Singgappulige Rosantha Kumara Loku, Chulho Song, Natalia Palina, 勝矢良雄, 山内涼輔, 松田晃史, 吉本護. X線回折によるエピタキシャルMg_xNi_1-xO薄膜の原子配列の秩序度の評価, 日本結晶学会 平成28年度年会, Oct. 2016.
• Osami Sakata, Yanna Chen, Ryosuke Yamauchi, Anli Yang, LOKU SINGGAPPULIGE, Rosantha Kumara, Chulho Song, Natalia Palina, Akifumi Matsuda, MAMORU YOSHIMOTO. Analysis of atomic-scale and electronic structures of epitaxial Mg_xNi_1-xO thin films using synchrotron x-ray diffraction and hard x-ray photoelectron spectroscopy, The 77th JSAP Autumn Meeting, 2016, The 77th JSAP Autumn Meeting, 2016 Extended Abstracts, The Japan Society of Applied Physics, Sept. 2016.  公式リンク  
  

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