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Elucidation of electron-band filling and pi-d electron interaction due to randomness in strongly correlated pi-electron systems

Research Project

Project/Area Number 16K05430
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Condensed matter physics II
Research InstitutionTohoku University

Principal Investigator

Iguchi Satoshi  東北大学, 金属材料研究所, 准教授 (50431789)

Research Collaborator Yoneyama Naoki  
Itoh Hirotake  
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2018: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2017: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2016: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Keywordsフィリング制御 / 電荷秩序 / 金属ー絶縁体転移 / πーd電子間相互作用 / 金属絶縁体転移 / バンドフィリング / πーd電子間相互 / 磁気誘電性 / 磁気輸送特性 / 有機分子性導体 / πーd相互作用 / 乱れ / 電子フィリング / 有機導体 / 物性実験
Outline of Final Research Achievements

a''-(BEDT-TTF)2RbCo(SCN)4 is a newly found strongly correlated π-electron system with the BEDT-TTF molecule of +0.4 valence or 0.8 π-electron band-filling due to the non stoichiometric Rb. This compound is suitable for the investigation for the filling-controll type metal-insulator transition. We have investigated the metal-insulator transition and theπ-d electron correlation of this system and other similar ones. We found that the insulator phase in the compound is a charge ordered state with 0.4 average valence of BEDT-TTF molecules, and phase transition by pressure from metal to semiconductor even at room temperature.

Academic Significance and Societal Importance of the Research Achievements

多くの2:1塩および関連物質の中では比較的例の少ないフィリング制御型の金属ー絶縁体転移について、その分子価数の変化とともにフィリングが3/4からずれていても電荷秩序相転移が生じることを見いだした。これによって、有機分子性導体における電子相関による金属ー絶縁体転移の理解が一層深まったと考えられる。また、近年注目されているBEDT-TTF塩の薄膜系におけるキャリアドーピング効果などにも有益な情報となるだろう。

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (24 results)

All 2019 2018 2017 2016 2015 Other

All Int'l Joint Research (2 results) Journal Article (8 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 8 results,  Acknowledgement Compliant: 1 results,  Open Access: 3 results) Presentation (11 results) (of which Int'l Joint Research: 5 results) Remarks (3 results)

  • [Int'l Joint Research] ゲーテ大学(ドイツ)

    • Related Report
      2017 Research-status Report
  • [Int'l Joint Research] Goethe University(ドイツ)

    • Related Report
      2016 Research-status Report
  • [Journal Article] Mesoscopic 2D Charge Transport in Commonplace PEDOT:PSS Films2018

    • 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

    • Related Report
      2018 Annual Research Report 2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] Linear magnetic field dependence of the magnetodielectric effect in eutectic BaTiO3-CoFe2O4 multiferroic material fabricated by containerless processing2018

    • Author(s)
      J. Fukushima, K. Ara, T. Nojima, S. Iguchi, Y. Hayashi, H. Takizawa
    • Journal Title

      Applied Physics Letters

      Volume: 112 Issue: 21 Pages: 212903-212903

    • DOI

      10.1063/1.5025072

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Electric-field-induced intradimer charge disproportionation in the dimer-Mott insulatorβ'-(BEDT-TTF)2ICl2.2017

    • Author(s)
      Yuma Hattori, Satoshi Iguchi,Takahiko Sasaki, Shinichiro Iwai, Hiromi Taniguchi and Hideo Kishida
    • Journal Title

      Phys. Rev. B

      Volume: 95 Issue: 8 Pages: 0851491-5

    • DOI

      10.1103/physrevb.95.085149

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Dimer-Mott and charge-ordered insulating states in the quasi-one-dimensional organic conductors delta(P)'- and delta(C)'-(BPDT-TTF)(2)ICl22017

    • Author(s)
      Kobayashi, R. and Hashimoto, K. and Yoneyama, N. and Yoshimi, K. and Motoyama, Y. and Iguchi, S. and Ikemoto, Y. and Moriwaki, T. and Taniguchi, H. and Sasaki, T.
    • Journal Title

      Physical Review B

      Volume: 96 Issue: 11 Pages: 1151121-8

    • DOI

      10.1103/physrevb.96.115112

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] Crystallization and vitrification of electrons in a glass-forming charge liquid2017

    • 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

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Quantum-disordered state of magnetic and electric dipoles in an organic Mott system2017

    • 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

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Magneto-thermopower in the Weak Ferromagnetic Oxide CaRu0.8Sc0.2O3: An Experimental Test for the Kelvin Formula in a Magnetic Material2017

    • Author(s)
      Yamamoto, Takafumi D. and Taniguchi, Hiroki and Yasui, Yukio and Iguchi, Satoshi and Sasaki, Takahiko and Terasaki, Ichiro
    • Journal Title

      Journal of the Physical Society of Japan

      Volume: 86 Issue: 10 Pages: 104707-104707

    • DOI

      10.7566/jpsj.86.104707

    • NAID

      210000134555

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Emergence of charge degrees of freedom under high pressure in the organic dimmer-Mott insulator b7-(BEDT-TTF)2ICl2K2015

    • Author(s)
      K. Hashimoto, R. Kobayashi, H. Okamura, H. Taniguchi, Y. Ikemoto, T. Moriwaki, S. Iguchi, M. Naka, S. Ishihara and T. Sasaki
    • Journal Title

      Phys. Rev. B

      Volume: 92 Issue: 8 Pages: 085149-085149

    • DOI

      10.1103/physrevb.92.085149

    • Related Report
      2016 Research-status Report
    • Peer Reviewed
  • [Presentation] α''-(BEDT-TTF)2Rb1.2Co(SCN)4 の磁場中赤外分光2019

    • Author(s)
      井口敏, 山田修平, M.K. Nuryadin, 小林亮太, 森田康太郎, 米山直樹, 池本夕佳, 森脇太郎, 佐々木孝彦
    • Organizer
      日本物理学会 第74回年次大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Elucidation and exploration of charge-spin complex properties in organic strongly correlated π-d electrons system2018

    • Author(s)
      Satoshi Iguchi, Syuhei Yamada, Naoki Yoneyama, Takahiko Sasaki
    • Organizer
      J-Physics Annual Meeting FY2018
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Metal-Insulator Transition and Magnetocapacitance Effect in alpha’’-(BEDT-TTF)2RbCo(SCN)42018

    • Author(s)
      Satoshi Iguchi, Syuhei Yamada, Ryota Kobayashi, Naoki Yoneyama, and Takahiko Sasaki
    • Organizer
      ICSM2018
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] α''-(BEDT-TTF)2RbCo(SCN)4 の赤外分光2018

    • Author(s)
      井口敏、山田修平、小林亮太、米山直樹、池本夕佳、森脇太郎、佐々木孝彦
    • Organizer
      日本物理学会2018年秋季大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Electrical Properties of a''-(BEDT-TTF)2RbCo(SCN)42018

    • Author(s)
      Satoshi IGUCHI, Syuhei YAMADA, Ryota KOBAYASHI, Naoki YONEYAMA, Takahiko SASAKI
    • Organizer
      SMS2018
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] a''-(BEDT-TTF)2RbCo(SCN)4 における 金属ー絶縁体転移近傍の赤外分光2017

    • Author(s)
      井口敏、小林亮太、米山直樹、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、豊中キャンパス
    • Year and Date
      2017-03-17
    • Related Report
      2016 Research-status Report
  • [Presentation] α’’-(BEDT-TTF)2RbCo(SCN)4の電子物性2017

    • Author(s)
      井口敏
    • Organizer
      第133回 金研講演会
    • Related Report
      2017 Research-status Report
  • [Presentation] Electrical Properties of α’’-(BEDT-TTF)2RbCo(SCN)42017

    • Author(s)
      Satoshi Iguchi
    • Organizer
      ISCOM2017
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] 金属-絶縁体転移系α’’-(BEDT-TTF)2RbCo(SCN)4 の磁場応答2017

    • Author(s)
      井口敏
    • Organizer
      金研ワークショップ「多自由度・多階層が協奏する物質材料システムの科学」
    • Related Report
      2017 Research-status Report
  • [Presentation] ダイマーモット絶縁体b'-(BEDT-TTF)2ICl2の輸送ノイズ測定III2016

    • Author(s)
      井口敏、黒子めぐみ、B.Hartmann、J. Mueller、谷口弘三、佐々木孝彦
    • Organizer
      日本物理学会、2016年秋季大会
    • Place of Presentation
      金沢大学角間キャンパス
    • Year and Date
      2016-09-13
    • Related Report
      2016 Research-status Report
  • [Presentation] Metal-Insulator Transition and Magneto-transport in a''-Type BEDT-TTF Salts2016

    • Author(s)
      Satoshi IGUCHI, Megumi KUROSU, Naoki YONEYAMA, Takahiko SASAKI
    • Organizer
      The 15th International Conference on Molecule-Based Magnets 2016
    • Place of Presentation
      Sendai International Center
    • Year and Date
      2016-09-04
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Remarks] 研究室、成果等紹介

    • URL

      http://cond-phys.imr.tohoku.ac.jp/index.html

    • Related Report
      2018 Annual Research Report
  • [Remarks] 研究室

    • URL

      http://cond-phys.imr.tohoku.ac.jp/index.html

    • Related Report
      2017 Research-status Report
  • [Remarks] 佐々木研究室ホームページ

    • URL

      http://cond-phys.imr.tohoku.ac.jp/index.html

    • Related Report
      2016 Research-status Report

URL: 

Published: 2016-04-21   Modified: 2020-03-30  

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