論文

• Kenji Ohta, Sho Suehiro, Saori I. Kawaguchi, Yoshiyuki Okuda, Tatsuya Wakamatsu, Kei HIROSE, Yasuo Ohishi, Manabu Kodama, Shuichiro hirai, Shintaro Azuma. Measuring the Electrical Resistivity of Liquid Iron to 1.4 Mbar, PHYSICAL REVIEW LETTERS, Vol. 130, 266301, June 2023.
• Kenji Ohta, Yoshiyuki Okuda, Seiji Kimura, Yohan Park, Tatsuya Wakamatsu, Kei Hirose. A cylindrical SiC heater for an externally heated diamond anvil cell to 1500 K, Review of Scientific Instruments, 92, 015119, Jan. 2021.
• Kenji Ohta, Kei Hirose. The thermal conductivity of the Earth's core and implications for its thermal and compositional evolution, National Science Review, Oxford University Press, Volume 8, Issue 4, Dec. 2020.
• Yoshiyuki Okuda, Kenji Ohta, Akira Hasegawa, Takashi Yagi, Kei Hirose, Saori Kawaguchi, Yasuo Ohishi. Thermal conductivity of Fe-bearing post-perovskite in the Earth’s lowermost mantle, Earth and Planetary Science Letters, Vol. 547, pp. 116466, Oct. 2020.
• Yoshiyuki Okuda, Kenji Ohta, Ryosuke Sinmyo, Kei HIROSE, Yasuo Ohishi. Anomalous compressibility in (Fe,Al)ーbearing bridgmanite: implications for the spin state of iron, Physics and Chemistry of Minerals, Vol. 47, Sept. 2020.
• Kenji Ohta, Tatsuya Wakamatsu, Manabu Kodama, Katsuyuki Kawamura, Shuichiro Hirai. Laboratory-based x-ray computed tomography for 3D imaging of samples in a diamond anvil cell in situ at high pressures, Review of Scientific Instruments, Vol. 91, 093703, Sept. 2020.
• Hayato Inoue, Sho Suehiro, Kenji Ohta, Kei Hirose, Yasuo Ohishi. Resistivity saturation of hcp Fe-Si alloys in an internally heated diamond anvil cell: A key to assessing the Earth's core conductivity, Earth and Planetary Science Letters, Vol. 543, pp. 116357, Aug. 2020.
• Chie Kato, Koichiro Umemoto, Kenji Ohta, Shoh Tagawa, Kei Hirose, Yasuo Ohishi. Stability of fcc phase FeH to 137 GPa, American Mineralogist, 105, 2, Feb. 2020.
• Akira Hasegawa, Takashi Yagi, Kenji Ohta. Combination of pulsed light heating thermoreflectance and laser-heated diamond anvil cell for in-situ high pressure-temperature thermal diffusivity measurements, Review of Scientific Instruments, AIP Publishing, Volume 90, Issue 7, 074901 1-8, July 2019.
• Yoshiyuki Okuda, Kenji Ohta, Ryosuke Sinmyo, Kei HIROSE, Takashi Yagi, Yasuo Oishi. Effect of spin transition of iron on the thermal conductivity of (Fe, Al)-bearing bridgmanite, June 2019.
• Akira Hasegawa, Kenji Ohta, Takashi Yagi, Kei HIROSE, Yoshiyuki Okuda, Tadashi Kondo. Composition and pressure dependence of lattice thermal conductivity of (Mg,Fe)O solid solutions, Mar. 2019.
• Kenji Ohta, Yu Nishihara, Yuki Sato, Kei HIROSE, Takashi Yagi, Saori Imada Kawaguchi, Naohisa Hirao, Yasuo Ohishi. An experimental examination of thermal conductivity anisotropy in hcp iron, Frontiers in Earth Science, Frontiers Media, Volume 6, Nov. 2018.
• Kenji Ohta, Sho Suehiro, Kei HIROSE, Yasuo Oishi. Electrical resistivity of fcc phase iron hydrides at high pressures and temperatures, Comptes Rendus Geoscience, Sept. 2018.
• Tatsuya Wakamatsu, Kenji Ohta, Takashi Yagi, Kei Hirose, Yasuo Ohishi. Measurements of sound velocity in iron–nickel alloys by femtosecond laser pulses in a diamond anvil cell, Physics and Chemistry of Minerals, Jan. 2018.
• Sho Suehiro, Kenji Ohta, Kei Hirose, Guillaume Morard, Yasuo Ohishi. The influence of sulfur on the electrical resistivity of hcp iron:Implications for the core conductivity of Mars and Earth, Geophysical Research Letters, Aug. 2017.
• Yoshiyuki Okuda, Kenji Ohta, Takashi Yagi, Ryosuke Sinmyo, Tatsuya Wakamatsu, Kei HIROSE, Yasuo Oishi. The effect of iron and aluminum incorporation on lattice thermal conductivity of bridgmanite at the Earth's lower mantle, Earth and Planetary Science Letters, vol. 474, pp. 25-31, June 2017.
• Kenji Ohta, Takashi Yagi, Kei HIROSE, Yasuo Oishi. Thermal conductivity of ferropericlase in the Earth's lower mantle, Earth and Planetary Science Letters, 465, 29-37, Mar. 2017.
• Matsuoka, T., Kuno, K., Kenji Ohta, Sakata, M., Nakamoto, Y., Hirao, N., Ohishi, Y., Shimizu, K., Kume, T., Sasaki, S.. Lithium polyhydrides synthesized under high pressure and high temperature, Journal of Raman Spectroscopy, Vol. 48, No. 9, pp. 1222-1228, 2017.
• Kenji Ohta, Yasuhiro Kuwayama, Kei Hirose, Katsuya Shimizu, Yasuo Ohishi. Experimental determination of the electrical resistivity of iron at Earth’s core conditions, Nature, 534, 95, June 2016.
• Shoh Tagawa, Kenji Ohta, Kei Hirose, Chie Kato, Yasuo Oishi. Compression of Fe–Si–H alloys to core pressures, Geophysical Research Letters, Vol. 43, Mar. 2016.
• Kenji Ohta, Kota Ichimaru, Mari Einaga, Sho Kawaguchi, Katsuya Shimizu, Takahiro Matsuoka, Naohisa Hirao, Yasuo Ohishi. Phase bounadry of hot dense fluid hydrogen, Scientific Reports, Nature Publishing Group, Vol. 5, Nov. 2015.  公式リンク  
  
• Saori Imada, Kenji Ohta, Takashi Yagi, Kei HIROSE, Hideto Yoshida, Hiroko Nagahara. Measurements of lattice thermal conductivity of MgO to core-mantle boundary pressures, Geophysical Research Letters, vol. 41, June 2014.
• Kenji Ohta, Kiyoshi Fujino, yasuhiro kuwayama, Tadashi Kondo, Katsuya Shimizu, Yasuo Ohishi. Highly conductive iron-rich (Mg,Fe)O magnesiowüstite and its stability in the Earth’s lower mantle, Juornal of Geophysical Research, Solid Earth, vol. 119, May 2014.
• Matsuoka, T., Sakata, M., Nakamoto, Y., Takahama, K., Ichimaru, K., Mukai, K., Ohta, K., Hirao, N., Ohishi, Y., Shimizu, K.. Pressure-induced re-entrant metallic phase of lithium, Physical review. B, Condensed matter and materials physics, vol. 89, 144103, Apr. 2014.
• Kenji Ohta, Takashi Yagi, Kei Hirose. Thermal diffusivities of MgSiO3 and Al-bearing MgSiO3 perovskites, American Mineralogist, vol. 99, pp. 94-97, Jan. 2014.
• Hitoshi Gomi, Kenji Ohta, Kei Hirose, Stephane Labrosse, Razvan Caracas, Matthieu J. Verstraete, John W. Hernlund. The high conductivity of iron and thermal evolution of the Earth’s core, Physics of the Earth and Planetary Interiors, Vol. 224, pp. 88-103, 2013.
• Kenji Ohta, Takashi Yagi, Naoyuki Taketoshi, Kei Hirose, Tetsuya Komabayashi, Tetsuya Baba, Yasuo Ohishi, John W. Hernlund. Lattice thermal conductivity of MgSiO3 perovskite and post-perovskite at the core-mantle boundary, Earth and Planetary Science Letters, Vol. 349-350, pp. 109-115, 2012.
• Emiko Sugimura, Tetsuya Komabayashi, Kenji Ohta, Kei Hirose, Yasuo Ohishi, Leonid Dubrovinsky. Experimental evidence of superionic conduction in H2O ice, Journal of Chemical Physics, Vol. 137, pp. 194505, 2012.
• Kenji Ohta, Ronald E. Cohen, Kei Hirose, Kristjan Haule, Katsuya Shimizu, Yasuo Ohishi. Experimental and theoretical evidence for pressure-induced metallization in FeO with the rock-salt type structure, PHYSICAL REVIEW LETTERS, Vol. 108, pp. 026403, 2012.  公式リンク  
  
• Haruka Ozawa, Kei Hirose, Kenji Ohta, Hirofumi Ishii, Nozomu Hiaoka, Yasuo Ohishi, Yusuke Seto. Spin crossover, structural change, and metallization in NiAs-type FeO at high pressure, Physical review. B, Condensed matter and materials physics, Vol. 84, pp. 134417, 2011.
• Takashi Yagi, Kenji Ohta, Kennichi Kobayashi, Naoyuki Taketoshi, Kei Hirose, Tetsuya Baba. Thermal diffusivity measurement in diamond anvil cell using light pulse thermoreflectance technique, Measurement Science and Technology, Vol. 22, pp. 024011, 2011.
• 八木 貴志, 太田 健二, 小林 謙一, 竹歳 尚之, 廣瀬 敬, 馬場 哲也. 光パルス加熱サーモリフレクタンス法によるダイヤモンドアンビルセルを用いた高圧下の熱拡散率測定, Thermophysical properties, Vol. 31, Oct. 2010.
• Kenji Ohta, Kei Hirose, Masahiro Ichiki, Katsuya Shimizu, Nagayoshi Sata, Yasuo Ohishi. Electrical conductivities of pyrolitic mantle and MORB materials up to the lowermost mantle conditions, Earth and Planetary Science Letters, Vol. 289, pp. 497-502, 2010.
• Tsuyoshi Iizuka, Malcolm T. McCulloch, Tsuyoshi Komiya, Takazo Shibuya, Kenji Ohta, Haruka Ozawa, Emiko Sugimura, Kenneth D. Collerson. Monazite geochronology and geochemistry of meta-sediments in the Narryer Gneiss Complex, Western Australia: constraints on the tectonothermal history and provenance, Contributions to Mineralogy and Petrology, Vol. 160, pp. 803-823, 2010.
• Kenji Ohta, Kei Hirose, Katsuya Shimizu, Yasuo Ohishi. High-pressure experimental evidence for metal FeO with normal NiAs-type structure, Physical review. B, Condensed matter and materials physics, Vol. 82, pp. 174120, 2010.
• Kenji Ohta, Kei Hirose, Katsuya Shimizu, Nagayoshi Sata, Yasuo Ohishi. The electrical resistance measurements of (Mg,Fe)SiO3 perovskite at high pressures and implications for electronic spin transition of iron, Physics of the Earth and Planetary Interiors, Vol. 180, pp. 154-158, 2010.
• 太田 健二, 廣瀬 敬, 新名 良介, 小野田 朱々江, 清水 克哉. レーザー加熱式ダイヤモンドセルを用いた(Mg,Fe)SiO_3ポストペロフスカイト相の電気伝導度測定, 高圧力の科学と技術 = The Review of high pressure science and technology, 日本高圧力学会, Vol. 18, No. 3, July 2008.
• Kenji Ohta, Kei Hirose, Thorne Lay, Nagayoshi Sata, Yasuo Ohishi. Phase transitions in pyrolite and MORB at lowermost mantle conditions: Implications for a MORB-rich pile above the core-mantle boundary, Earth and Planetary Science Letters, Vol. 267, pp. 107-117, 2008.
• Kenji Ohta, Suzue Onoda, Kei Hirose, Ryosuke Sinmyo, Katsuya Shimizu, Nagayoshi Sata, Yasuo Ohishi, Akira Yasuhara. The electrical conductivity of post-perovskite in Earth's D" layer, Science, Vol. 320, No. 5872, pp. 89-91, 2008.  公式リンク  
  
• Kenji Ohta, Kei Hirose, Suzue Onoda, Katsuya Shimizu. The effect of iron spin transition on electrical conductivity of (Mg,Fe)O magnesiowüstite, Proceedings of the Japan Academy, Ser. B Physical and Biological Sciences, Vol. 83, pp. 97, 2007.

国際会議発表 (査読有り)

• Tatsuya Wakamatsu, Kenji Ohta, Shoh Tagawa, Yagi Takashi, Kei Hirose, Yasuo Ohishi. Sound velocity measurements on hcp-FeHx (x<1) under high pressures by femtosecond pulse laser pump-probe technique, AGU Fall Meeting 2019, Dec. 2019.  公式リンク  
  
• Shoh Tagawa, Kenji Ohta, Kei Hirose, Yasuo Oishi. Phase relations in non-stoichiometric FeHx at high pressures, AGU Fall meeting 2018, Dec. 2018.  公式リンク  
  
• Shoh Tagawa, Kenji Ohta, Kei Hirose, Yasuo Oishi. Formation of non-stoichiometric fcc and hcp FeHx at high pressure and temperature conditions, High-Pressure Mineral Physics Seminar (HPMPS-9), Oct. 2017.  公式リンク  
  
• Shoh Tagawa, Kenji Ohta, Kei Hirose, Yasuo Oishi. Compression behavior of Fe-Si-H alloys, AGU Fall meeting 2015, Dec. 2015.

国内会議発表 (査読有り)

• Shoh Tagawa, Kenji Ohta, Kei Hirose, Yasuo Oishi. Compression of hcp Fe-Si-H alloy to 130 GPa, JpGU, May 2015.

国内会議発表 (査読なし・不明)

• ⽯澤紀, 太⽥健⼆, 蛯名瞭⽃, 河⼝沙織, 兒⽟学, 平井秀⼀郎. MgOの融解曲線の決定, 第63回高圧討論会, Dec. 2022.
• 太田健二, 兒玉学, 松木祐太朗, 河村雄行, 平井秀一郎. X線CT 技術を用いたダイヤモンドアンビルセル中の試料の高圧その場形状観察, 第60回高圧討論会, Oct. 2019.
• 松木祐太朗, 兒玉学, 河村雄行, 太田健二, 植村豪, 幸琢寛, 平井秀一郎. 全固体電池の超高圧下X線CT構造解析, 第56回日本伝熱シンポジウム, May 2019.
• 松木祐太朗, 兒玉学, 河村雄行, 太田健二, 植村豪, 幸琢 寛, 平井秀一郎. 全固体電池の超高圧下X線CT構造解析, 第56回日本伝熱シンポジウム, May 2019.
• 奥田 善之, 山田 明, 太田 健二, 前田 毅, 和田 隆博, 廣瀬 敬. ダイヤモンドアンビルセルを用いた超高圧力下におけるp型伝導性SrCuSeF，BaCuSeFの電気伝導度測定, 第66回応用物理学会春季学術講演会, Mar. 2019.
• 田川翔, 太田健二, 廣瀬敬, 大石泰生. レーザ加熱式DACを用いた鉄-水素系高温高圧相の合成, 第4回「公益社団法人日本金属学会研究会 水素化物に関わる次世代学術・応用展開研究会」, Nov. 2017.  公式リンク  
  
• 太田 健二. アメリカ地球物理学連合秋季大会 (AGU2011 Fall Meeting) 報告, 高圧力の科学と技術 = The Review of high pressure science and technology, 日本高圧力学会, Vol. 22, No. 2, Apr. 2012.
• 八木 貴志, 太田 健二, 小林 謙一, 竹歳 尚之, 廣瀬 敬, 馬場 哲也. 日本熱物性学会賞論文賞を受賞して, 熱物性 : Japan journal of thermophysical properties, Vol. 26, No. 1, Jan. 2012.
• 太田 健二, 八木 貴志, 竹歳 尚之, 廣瀬 敬, 馬場 哲也. 下部マントル鉱物の熱伝導率, 高圧討論会講演集, Vol. 51, Sept. 2010.
• 五味 斎, 太田 健二, 廣瀬 敬. 静的高圧下における鉄の電気伝導度測定, 高圧討論会講演集, Vol. 51, Sept. 2010.

その他の論文・著書など

• 太田健二. 高圧力下における地球深部物質の電気・熱伝導率測定, 高圧力の科学と技術, 日本高圧力学会, Vol. 26, No. 2, pp. 189-195, 2016.
• 太田健二, 八木貴志, 廣瀬敬. パルス光加熱サーモリフレクタンス法を 用いた高圧力下での下部マントル鉱物の 格子熱伝導率測定, 高圧力の科学と技術, 日本高圧力学会, vol. 24, no. 2, pp. 118-125, June 2014.  公式リンク  
  

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