Experimental study of the nonlinear responses due to the charge inhomogeneity in molecular conductors

• Project/Area Number: 15K17688
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Condensed matter physics II
• Research Institution: Tohoku University
• Principal Investigator: ITOH Keisuke 東北大学, 金属材料研究所, 助教 (10733256)
• Research Collaborator: SASAKI Takahiko ; IGUCHI Satoshi ; HASHIMOTO Kenichiro ; IWAI Shinichiro ; ITOH Hirotake
• Project Period (FY): 2015-04-01 – 2018-03-31
• Project Status: Completed (Fiscal Year 2017)
• Budget Amount: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000); Fiscal Year 2017: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2016: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2015: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
• Keywords: 有機伝導体 / 赤外分光 / 分子性導体 / 金属-絶縁体転移

Outline of Final Research Achievements

Macroscopic inhomogeneity due to the strongly correlated electrons in BEDT-TTF system was investigated by optical measurements. The phase separation between metal and insulator domains and its dynamics in charge ordered salts were observed by mid-infrared microscopy with synchrotron radiation. In addition, the spatial symmetry breaking in dimer-Mott type salts was investigated by femtosecond-pulse-induced terahertz emission spectroscopy.

Research Products

• [Journal Article] Mesoscopic 2D Charge Transport in Commonplace PEDOT:PSS Films (2018)
  • Author(s): Y. Honma, K. Itoh, H. Masunaga, A. Fujiwara, T. Nishizaki, S. Iguchi, and T. Sasaki
  • Journal Title: Advanced Electronic Materials Volume: 4 Issue: 2 Pages: 1700490-1700490
  • DOI: 10.1002/aelm.201700490
  • Peer Reviewed
• [Journal Article] Quantum-disordered state of magnetic and electric dipoles in an organic Mott system (2017)
  • Author(s): Shimozawa M.、Hashimoto K.、Ueda A.、Suzuki Y.、Sugii K.、Yamada S.、Imai Y.、Kobayashi R.、Itoh K.、Iguchi S.、Naka M.、Ishihara S.、Mori H.、Sasaki T.、Yamashita M.
  • Journal Title: Nature Communications Volume: 8 Issue: 1 Pages: 1-6
  • DOI: 10.1038/s41467-017-01849-x
  • Peer Reviewed / Open Access
• [Journal Article] Crystallization and vitrification of electrons in a glass-forming charge liquid (2017)
  • Author(s): Sasaki S.、Hashimoto K.、Kobayashi R.、Itoh K.、Iguchi S.、Nishio Y.、Ikemoto Y.、Moriwaki T.、Yoneyama N.、Watanabe M.、Ueda A.、Mori H.、Kobayashi K.、Kumai R.、Murakami Y.、M?ller J.、Sasaki T.
  • Journal Title: Science Volume: 357 Issue: 6358 Pages: 1381-1385
  • DOI: 10.1126/science.aal3120
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] 導電性高分子PEDOT/PSS 膜におけるメゾスコピック二次元伝導 (2017)
  • Author(s): 伊藤桂介
  • Journal Title: C & I commun : colloid & interface communication : newsletter from DCSC Volume: 42 Pages: 24-27
  • NAID: 40021247058
• [Presentation] 6 fs単一サイクル光強電場による有機超伝導体の非線形電荷振動 (2018)
  • Author(s): 川上洋平, 天野辰哉, 米山雄登, 赤嶺勇人, 伊藤弘毅, 川口玄太, 山本浩史, 岸田英夫, 伊藤桂介, 佐々木孝彦, 石原純夫, 田中康寛, 米満賢治, 岩井伸一郎
  • Organizer: 日本物理学会 第73回年次大会
• [Presentation] 導電性高分子PEDOT:PSSにおける高度結晶化の時分割観測 (2018)
  • Author(s): 伊藤桂介, 増永啓康, 井口敏, 佐々木孝彦
  • Organizer: 日本物理学会 第73回年次大会
• [Presentation] Mesoscopic 2D Weak Localization in PEDOT/PSS Thick Films (2017)
  • Author(s): K. Itoh, Y. Honma, H. Masunaga, A. Fujiwara, T. Nishizaki, S. Iguchi, T. Sasaki
  • Organizer: 12th International Symposium on Crystalline Organic Metals, Superconductors and Magnets (ISCOM2017)
  • Int'l Joint Research
• [Presentation] Ultrafast orbital excitation by 6 fs pulse in V2O3 (2017)
  • Author(s): Y. Kawakami, T. Kato, Y. Yoneyama, T. Amano, H. Itoh, K. Itoh, T. Sasaki, Y. Nakamura, H. Kishida, L. Cario, E. Janod, B. Corraze, M. Lorenc, S. Iwai
  • Organizer: 6th International Conferences on Photoinduced Phase Transitions (PIPT6)
  • Int'l Joint Research
• [Presentation] 電荷ガラス形成物質θm -(BEDT-TTF)2TlZn(SCN)4における幾何学的フラストレーションがもたらすエネルギーランドスケープ (2017)
  • Author(s): 佐々木智, 橋本顕一郎, 小林亮太, 伊藤桂介, 井口敏, 上田顕, 森初果, 小林賢介, 熊井玲児, 村上洋一, 佐々木孝彦
  • Organizer: 日本物理学会 第72回年次大会
  • Place of Presentation: 大阪大学
• [Presentation] κ-H3(Cat-EDT-TTF)2におけるプロトン揺らぎがもたらすπ電子サーモクロミズム (2016)
  • Author(s): 伊藤桂介, 橋本顕一郎, 小林亮太, 黒子めぐみ, 上田顕, 森初果, 井口敏, 佐々木孝彦
  • Organizer: 日本物理学会 第71回年次大会（2016年）
  • Place of Presentation: Sendai, Miyagi, Japan
  • Year and Date: 2016-03-19
• [Presentation] κ-H3(Cat-EDT-TTF)2におけるプロトン揺らぎがもたらすπ電子サーモクロミズムII (2016)
  • Author(s): 伊藤桂介, 橋本顕一郎, 小林亮太, 上田顕, 森初果, 井口 敏, 佐々木孝彦
  • Organizer: 日本物理学会 2016年秋季大会
  • Place of Presentation: 金沢大学
• [Presentation] Improvement of Out-of-plane Charge Transport in AcidTreated Highly Conductive PEDOT/PSS films (2016)
  • Author(s): K. Itoh, H. Honma, N. Asano, Y. Kato, H. Masunaga, A. Fujiwara, T. Sasaki
  • Organizer: The International Conference on Science and Technology of Synthetic Metals in 2016
  • Place of Presentation: Guangzhou, China
  • Int'l Joint Research
• [Presentation] Observation of spatial symmetry breaking in κ-(ET)2Cu2(CN)3 by terahertz emission spectroscopy (2015)
  • Author(s): K.Itoh, H. Itoh, N. Yoneyama, T. Sasaki, and S. Iwai
  • Organizer: The International Chemical Congress of Pacific Basin Societies 2015 (Pacifichem2015)
  • Place of Presentation: Honolulu, Hawaii, USA
  • Year and Date: 2015-12-18
  • Int'l Joint Research
• [Presentation] κ-H3(Cat-EDT-TTF)2における水素結合がもたらす強誘電性II：分光測定 (2015)
  • Author(s): 伊藤桂介, 橋本顕一郎, 井口敏, 小林亮太, 上田顕, 森初果, 佐々木孝彦
  • Organizer: 日本物理学会 2015年秋季大会
  • Place of Presentation: Osaka, Osaka, Japan
  • Year and Date: 2015-09-18
• [Presentation] Spatial Symmetry Breaking in κ-(BEDT-TTF)2Cu2(CN)3 Investigated by Terahertz Emission Spectroscopy (2015)
  • Author(s): K.Itoh, H. Itoh, N. Yoneyama, T. Sasaki, and S. Iwai
  • Organizer: 11th International Symposium on Crystalline Organic Metals, Superconductors and Magnets (ISCOM2015)
  • Place of Presentation: Bad Gogging, Germany
  • Year and Date: 2015-09-10
  • Int'l Joint Research