Interplay of Charge ordered state and superconductivity in organic conductors

• Project/Area Number: 21740244
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Condensed matter physics II
• Research Institution: The University of Tokyo
• Principal Investigator: KONDO Ryusuke The University of Tokyo, 大学院・総合文化研究科, 助教 (60302824)
• Project Period (FY): 2008 – 2010
• Project Status: Completed (Fiscal Year 2010)
• Budget Amount: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000); Fiscal Year 2010: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000); Fiscal Year 2009: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
• Keywords: 有機導体 / 電荷秩序相 / 超伝導 / 強相関電子系 / 物性実験 / 電荷秩序

Research Abstract

To investigate the interplay of charge ordered insulating state and superconductivity (Metallic phase), electronic and structural properties of α-, θ-, and β"-type organic conductors were studied under hydrostatic pressure and uniaxial strain. We found two cases ; I) a metallic phase having strong charge fluctuation located neighboring the charge ordered insulating phase (COI), and II) a charge ordered metallic state existed between COI and the metallic phase.

Research Products

• [Journal Article] Interplay of charge-density waves and superconductivity in the organic cinductor β"-(BEDT-TTF)_2AuBr_2 (2010)
  • Author(s): R.Kondo M.Higa, S.Kagoshima, N.Hanasaki, Y.Nogami, H.Nishikawa
  • Journal Title: Phhys.Rev 81 Pages: 24519-24519
  • Peer Reviewed
• [Journal Article] Ultrafast photo-induced insulator-to-metal transition in the spin density wave system of (TMTSF)_2PF_6 (2010)
  • Author(s): S.Watanabe, R.Kondo S.Kagoshima R.Shimano
  • Journal Title: Physica B 40
  • Peer Reviewed
• [Journal Article] Electronic states of organic quasi-two dimensional conductor β"-(DODHT)_2PF_6 : Charge ordering and superconductivity (2010)
  • Author(s): M.Higa, R.Kondo, A.Murata, S.Kagoshima, H.Nishikawa, K.Yakushi
  • Journal Title: Physica B 405
  • Peer Reviewed
• [Journal Article] Electronic states of organic quasi-two dimensional conductor β"-(DODHT)_2PF_6 : Charge ordering and superconductivity (2010)
  • Author(s): M.Higa, R.Kondo, A.Murata, S.Kagoshima, H.Nishikawa, K.Yakushi
  • Journal Title: Physica B Volume: 405
  • Peer Reviewed
• [Journal Article] Observation of ultrafast photo-induced closing and recovery of the spin-density-wave gap in (TMTSF)_2PF_6 (2010)
  • Author(s): S.Watanabe, R.Kondo, S.Kagoshima, R.Shimano
  • Journal Title: Physica B Volume: 405
  • Peer Reviewed
• [Journal Article] Interplay of charge-density waves and superconductivity in the organic conductor β"-(BEDT-TTF)_2AuBr_2 (2010)
  • Author(s): Ryusuke Kondo, M.Higa, S.Kagoshima, N.Hanasaki, Y.Nogami, H.Nishikawa
  • Journal Title: PHYSICAL REVIEW B Volume: 81 Pages: 24519-24519
  • Peer Reviewed
• [Journal Article] Observation of ultrafast photoinduced closing and recovery of the spin-density-wave gap in (TMTSF)_2PF_6 (2009)
  • Author(s): S.Watanabe, R.Kondo, S.Kagoshima, R.Shimano
  • Journal Title: Phys.Rev.B 80
  • Peer Reviewed
• [Journal Article] Effects of Hydrostatic Pressure and Uniaxial Strain on SpinPeierls Transition in an Organic Radical Magnet, BBDTA・InCl_4 (2009)
  • Author(s): M.Mito, S.Kawagoe, H.Deguchi, S.Takagi, W.Fujita, K.Awaga, R.Kondo S.Kagoshima
  • Journal Title: J.Phys.Soc.Jpn 78 Pages: 124705-124705
  • Peer Reviewed
• [Journal Article] Crystal and Electronic Structures of the Quasi-Two-Dimensional Organic Conductor α-(BEDT-TTF)_2I_3 and Its Selenium Analogue α-(BEDT-TSeF)_2I_3 under Hydrostatic Pressure at Room Temperature (2009)
  • Author(s): R.Kondo, S.Kagoshima, N.Tajima, R.Kato
  • Journal Title: J.Phys.Soc.Jpn 78 Pages: 114714-114714
  • Peer Reviewed
• [Journal Article] Crystal and Electronic Structures of the Quasi-Two-Dimensional Organic Conductor α-(BEDT-TTF)_2I_3 and Its Selenium Analogue α-(BEDT-TSeF)_2I_3 under Hydrostatic Pressure at Room Temperature (2009)
  • Author(s): Ryusuke KONDO, S.KAGOSHIMA, N.TAJIMA, R.KATO
  • Journal Title: Journal of the Physical Society of Japan Volume: 78 Pages: 114714-114714
  • Peer Reviewed
• [Presentation] (TMTCF)_2XのCDW/COのX線放射光観察1 (2011)
  • Author(s): 野上由夫, 戸田敦基, 近藤隆祐, 花咲徳亮, 神戸高志, 中尾朗子
  • Organizer: 日本物理学会第66回年次大会
  • Place of Presentation: 新潟大学
  • Year and Date: 2011-03-26
• [Presentation] θ-(BEDTTTF)_2CsZn(SCN)_4の一軸圧縮下における電子状態;^<13>C-NMR研究III (2011)
  • Author(s): 高橋遼平, 矢澤美穂, 千葉亮, 開康一, 高橋利宏, 山本浩史, 近藤隆祐, 鹿児島誠一
  • Organizer: 日本物理学会第66回年次大会(中止)
  • Place of Presentation: 新潟大学
  • Year and Date: 2011-03-25
• [Presentation] 一軸性圧縮下θ-(BEDT-TTF)_2CsZn(SCN)_4の構造変調 (2011)
  • Author(s): 近藤隆祐, 鹿児島誠一, 熊井玲児, 中尾朗子, 谷本由衣, 野上由夫, 澤博
  • Organizer: 日本物理学会第66回年次大会
  • Place of Presentation: 新潟大学
  • Year and Date: 2011-03-25
• [Presentation] θ-(BEDT-TTF)_2CsZn(SCN)_4の一軸圧縮下における電子状態 ; ^<13>C-NMR研究III (2011)
  • Author(s): 高橋遼平, 矢澤美穂, 千葉亮, 開康一, 高橋利宏, 山本浩史, 近藤隆祐, 鹿児島誠一
  • Organizer: 日本物理学会第66回年次大会
  • Place of Presentation: 新潟大学
  • Year and Date: 2011-03-25
• [Presentation] β"-(DODHT)_2PF_6の電荷秩序と超伝導 (2010)
  • Author(s): 近藤隆祐, 鹿児島誠一, 山本薫, 薬師久弥, 西川浩之
  • Organizer: 日本物理学会2010年秋季大会
  • Place of Presentation: 大阪府大
  • Year and Date: 2010-09-23
• [Presentation] β'-(DODHT)_2PF_6の電荷秩序と超伝導 (2010)
  • Author(s): 近藤隆祐, 鹿児島誠一, 山本薫, 薬師久弥, 西川浩之
  • Organizer: 日本物理学会2010年秋季大会
  • Place of Presentation: 大阪府大
  • Year and Date: 2010-09-23
• [Presentation] θ型有機導体の一軸性圧縮下交流伝導度測定 (2010)
  • Author(s): 近藤隆祐, 鹿児島誠一
  • Organizer: 日本物理学会第65回年次大会
  • Place of Presentation: 岡山大学
  • Year and Date: 2010-03-20
• [Presentation] β"型有機導体の電荷ゆらぎ相の電子物性(II) (2009)
  • Author(s): 近藤隆祐, 比嘉百夏, 村田淳, 鹿児島誠一, 西川浩之
  • Organizer: 日本物理学会2009年秋季大会
  • Place of Presentation: 熊本大学
  • Year and Date: 2009-09-25
• [Presentation] 一軸性圧縮下θ-(BEDTTTF)_2CsZn(SCN)_4の構造変調 (2001)
  • Author(s): 近藤隆祐, 鹿児島誠一, 熊井玲児, 中尾朗子, 谷本由衣, 野上由夫, 澤博
  • Organizer: 日本物理学会第66回年次大会(中止)
  • Place of Presentation: 新潟大学
  • Year and Date: 2001-03-25
• [Presentation] (TMTCF)_2XのCDW/COのX線放射光観察1 (2001)
  • Author(s): 野上由夫, 戸田敦基, 近藤隆祐, 花咲徳亮, 神戸高志, 中尾朗子
  • Organizer: 日本物理学会第66回年次大会(中止)
  • Place of Presentation: 新潟大学
  • Year and Date: 2001-03-25
• [Remarks] ホームページ等 なし