Control of carrier number and Mott criticality in strongly correlated organic conductors with molecular defects by irradiation

• Project/Area Number: 20340085
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Condensed matter physics II
• Research Institution: Tohoku University
• Principal Investigator: SASAKI Takahiko 東北大学, 金属材料研究所, 教授 (20241565)
• Co-Investigator(Kenkyū-buntansha): YONEYAMA Naoki 山梨大学, 大学院・医学工学総合研究部, 助教 (80312643)
• Project Period (FY): 2008 – 2011
• Project Status: Completed (Fiscal Year 2011)
• Budget Amount: ¥18,590,000 (Direct Cost: ¥14,300,000、Indirect Cost: ¥4,290,000); Fiscal Year 2011: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000); Fiscal Year 2010: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000); Fiscal Year 2009: ¥8,840,000 (Direct Cost: ¥6,800,000、Indirect Cost: ¥2,040,000); Fiscal Year 2008: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
• Keywords: 強相関電子系 / 有機導体 / 物性実験 / 低温物性 / 分子性導体 / モット絶縁体 / 光学伝導度 / エックス線照射 / アンダーソン局在 / キャリアドープ / 有機超伝導体 / 公子性導体

Research Abstract

We have explored the disorder effect on the strongly correlated electron system with a bandwidth controlled metal-Mott insulator transition in the molecular dimer-Mott insulators irradiated by X-ray for introducing molecular defects. We found that Anderson localization arose with smaller disorder in approaching to the Mott critical phase transition point from both the metal and Mott insulator sides.

Research Products

• [Journal Article] Mott-Anderson Transition in Molecular Conductors : Influence of Randomness on Strongly Correlated Electrons in the.-(BEDT-TTF)2X system (2012)
  • Author(s): T. Sasaki
  • Journal Title: Crystals Volume: 2 Pages: 374-392
  • Peer Reviewed
• [Journal Article] 強相関電子系分子性導体のモット-アンダーソン転移 (2012)
  • Author(s): 佐々木孝彦
  • Journal Title: 日本物理学会誌 Volume: No.7(印刷中) Pages: 67-67
  • Peer Reviewed
• [Journal Article] Influence of randomness on the Mott transition in .-(BEDT-TTF)2X (2012)
  • Author(s): T. Sasaki, K. Sano, H. Sugawara, N. Yoneyama and N. Kobayashi
  • Journal Title: Phys. Status Solidi B Volume: 249 Pages: 947-952
  • Peer Reviewed
• [Journal Article] Influence of randomness on the Mott transition in κ-(BEDT-TTF)_2X (2012)
  • Author(s): T.Sasaki, et al
  • Journal Title: Phys.Status Solidi B Volume: 249 Issue: 5 Pages: 947-952
  • DOI: 10.1002/pssb.201100614
  • Peer Reviewed
• [Journal Article] Suppression of Superconductivity by Nonmagnetic Disorder in Organic Superconductor κ-(BEDT-TTF)_2Cu(NCS)_2 (2011)
  • Author(s): T. Sasaki, H. Oizumi, Y. Honda, N. Yoneyama and N. Kobayashi
  • Journal Title: J. Phys. Soc. Jpn. Volume: 80
  • Peer Reviewed
• [Journal Article] Suppression of Superconductivity by Nonmagnetic Disorder in Organic Superconductor κ-(BEDT-TTF)_2Cu(NCS)_2 (2011)
  • Author(s): T.Sasaki, et al
  • Journal Title: J.Phys.Soc.Jpn. Volume: 80 Issue: 10 Pages: 104703-104703
  • DOI: 10.1143/jpsj.80.104703
  • Peer Reviewed
• [Journal Article] Anomalous dielectric response in the dimer Mott insulator κ-(BEDT-TTF)_2Cu_2(CN)_3 (2010)
  • Author(s): M. Abdel-Jawad, I. Terasaki, T. Sasaki, N. Yoneyama, N. Kobayashi, Y. Uesu and C. Hotta
  • Journal Title: Phys. Rev. B Volume: 82
  • Peer Reviewed
• [Journal Article] Magnetic Properties of X-ray Irradiated Organic Mott Insulator κ-(BEDT-TTF)_2Cu[N(CN)_2] Cl (2010)
  • Author(s): N. Yoneyama, K. Furukawa, T. Nakamura, T. Sasaki, and N. Kobayashi
  • Journal Title: J. Phys. Soc. Jpn. Volume: 79
  • Peer Reviewed
• [Journal Article] Electron Localization near the Mott Transition in the Organic Superconductor κ-(BEDT-TTF)_2Cu[N(CN)_2] Br (2010)
  • Author(s): K. Sano, T. Sasaki, N. Yoneyama, N. Kobayashi
  • Journal Title: Phys. Rev. Lett Volume: 104
  • Peer Reviewed
• [Journal Article] Anomalous dielectric response in the dimer Mott insulator κ-(BEDT-TTF)_2Cu_2(CN)_3. (2010)
  • Author(s): M.Abdel-Jawad, I.Terasaki, T.Sasaki, N.Yoneyama, N.Kobayashi, Y.Uesu, C.Hotta.
  • Journal Title: Phys.Rev.B 82
  • Peer Reviewed
• [Journal Article] Magnetic Properties of X-ray Irradiated Organic Mott Insulator κ-(BEDT-TTF)_2Cu[N(CN)_2]Cl. (2010)
  • Author(s): N.Yoneyama, K.Furukawa, T.Nakamura, T.Sasaki, N. Kobayashi.
  • Journal Title: J.Phys.Soc.Jpn. 79
  • Peer Reviewed
• [Journal Article] Electron Localization near the Mott Transition in the Organic Superconductor κ-(BEDT-TTF)_2Cu[N(CN)_2]Br. (2010)
  • Author(s): K.Sano, T.Sasaki, N.Yoneyama, N.Kobayashi.
  • Journal Title: Phys.Rev.Lett. 104
  • Peer Reviewed
• [Journal Article] Anomalous dielectric response in the dimer Mott insulator κ-(BEDT-TTF)_2Cu_2(CN)_3 (2010)
  • Author(s): M.Abdel-Jawad
  • Journal Title: Phys.Rev.B Volume: 82
  • Peer Reviewed
• [Journal Article] Electron Localization near the Mott Transition in the Organic Superconductor κ-(BEDT-TTF)_2Cu[N(CN)_2]Br (2010)
  • Author(s): K.Sano
  • Journal Title: Phys.Rev.Lett. Volume: 104
  • Peer Reviewed
• [Journal Article] Magnetic Properties of X-ray Irradiated Organic Mott Insulator κ-(BEDT-TTF)_2Cu[N(CN)_2]Cl (2010)
  • Author(s): N.Yoneyama
  • Journal Title: J.Phys.Soc.Jpn. Volume: 79
  • Peer Reviewed
• [Journal Article] Thermal-transport measurements in a quantum spin-liquid state of the frustrated triangular magnet κ-(BEDT-TTF)_2Cu_2(CN)_3 (2009)
  • Author(s): M. Yamashita, N. Nakata, Y. Kasahara, T. Sasaki, N. Yoneyama, N. Kobayashi, S. Fujimoto, T. Shibauchi and Y. Matsuda
  • Journal Title: Nature Physics 5 Pages: 44-47
  • Peer Reviewed
• [Journal Article] Thermal-transport measurements in a quantum spin-liquid state of the frustrated triangular magnet κ-(BEDT-TTF)_2Cu_2(CN)_3. (2009)
  • Author(s): M.Yamashita, N.Nakata, Y.Kasahara, T.Sasaki, N.Yoneyama, N.Kobayashi, S.Fujimoto, T.Shibauchi, Y.Matsuda.
  • Journal Title: Nature Physics 5 Pages: 44-47
  • Peer Reviewed
• [Journal Article] エックス線照射による有機電荷移動錯体の金属化 (2009)
  • Author(s): 佐々木孝彦
  • Journal Title: 未来材料 9 Pages: 6-15
  • NAID: 40016818187
• [Journal Article] Competition between Mott transition and superconductivity under magnetic fields in strongly correlated organic superconductor κ-(BEDT-TTF)_2Cu[N(CN)_2]Br. (2009)
  • Author(s): 佐々木孝彦
  • Journal Title: J.Phys. : Conf.Ser. 150
  • Peer Reviewed
• [Journal Article] Metallic pattern fabrication in organic Mott insulating crystal by local X-ray irradiation. (2009)
  • Author(s): N.Yoneyama
  • Journal Title: Solid State Commun. 149 Pages: 775-777
  • Peer Reviewed
• [Journal Article] Spatial mapping of electronic states in κ-(BEDT-TTF)_2X using infrared reflectivity. (2009)
  • Author(s): 佐々木孝彦
  • Journal Title: Sci.Technol.Adv.Mater. 19
  • Peer Reviewed
• [Journal Article] Thermal-transport measurements in a quantum spin-liquid state of the frustrated triangular magnet κ-(BEDT-TTF)_2Cu_2(CN)_3 (2009)
  • Author(s): M. Yamashita
  • Journal Title: Nature Physics 5 Pages: 44-47
  • Peer Reviewed
• [Journal Article] Disorder effect on superconductivity in organic superconduetor κ-(BEDT-TTF)_2Cu(NCS)_2 (2009)
  • Author(s): T. Sasaki
  • Journal Title: J. Phys.: Conf. Ser. 150
  • Peer Reviewed
• [Journal Article] Competition between Mott transition and superconductivity under magnetic fields strongly correlated organic superconductor κ-(BEDT-TTF)_2Cu[N(CN)_2]Br (2009)
  • Author(s): T. Sasaki
  • Journal Title: J. Phys.: Conf. Ser. 150
  • Peer Reviewed
• [Journal Article] Metallic pattern fabrication in organic Mott insulating crystal by local X-ray irradiation (2009)
  • Author(s): N. Yoneyama
  • Journal Title: Solid State Commun. 149 Pages: 775-777
  • Peer Reviewed
• [Journal Article] Optical probe of carrier doping by x-ray irradiation in the organic dimer Mott insulator κ-(BEDT-TTF)_2Cu[N(CN)_2] Cl (2008)
  • Author(s): T. Sasaki, N. Yoneyama, Y. Nakamura, N. Kobayashi, Y. Ikemoto, T. Moriwaki and H. Kimura
  • Journal Title: Phys. Rev. Lett. Volume: 101
  • Peer Reviewed
• [Journal Article] Optical probe of carrier doping by x-ray irradiation in the organic dimer Mott insulator κ-(BEDT-TTF)_2Cu[N(CN)_2]Cl. (2008)
  • Author(s): T.Sasaki, N.Yoneyama, Y.Nakamura, N.Kobayashi, Y.Ikemoto, T.Moriwaki, H.Kimura.
  • Journal Title: Phys.Rev.Lett. 101
  • Peer Reviewed
• [Journal Article] Optical probe of carrier doping by x-ray irradiation in the organic dimer Mott insulator κ-(BEDT-TTF)_2Cu[N(CN)_2]Cl (2008)
  • Author(s): T. Sasaki
  • Journal Title: Phys. Rev. Lett. 101
  • Peer Reviewed
• [Journal Article] Femtosecond mid-IR pump-probe spectroscopy of photo induced insulator to metal transition in dimer Mott insulator κ-(BEDT-TTF)_2X (2008)
  • Author(s): Y. Kawakami
  • Journal Title: J. Phys. Chem. Solids 69 Pages: 3085-3088
  • Peer Reviewed
• [Presentation] 分子ダイマーに内在する電荷自由度と誘電応答 (2012)
  • Author(s): 佐々木孝彦
  • Organizer: 日本物理学会第67回年次大会シンポジウム「有機電荷移動錯体の特異な電荷応答と相転移」
  • Place of Presentation: 関西学院大学
  • Year and Date: 2012-03-25
• [Presentation] 電子誘電体の特異な誘電性と電子状態-実験から (2012)
  • Author(s): 佐々木孝彦
  • Organizer: KEK物構研CMRC研究会「遍歴系における幾何学的電子相関」
  • Place of Presentation: つくば国際会議場
  • Year and Date: 2012-01-11
• [Presentation] Influence of Randomness on Mott Transition in Organic Molecular Conductors (2011)
  • Author(s): T. Sasaki
  • Organizer: 9th International Symposium on Crystalline Organic Metals, Superconductors and Ferromagnets (ISCOM 2011)
  • Place of Presentation: Gniezno, Poland
  • Year and Date: 2011-09-26
• [Presentation] Influence of Randomness on Mott Transition in Organic Molecular Conductors (2011)
  • Author(s): T.Sasaki, et al
  • Organizer: 9th International Symposium on Crystalline Organic Metals, Superconductors and Ferromagnets (ISCOM 2011)
  • Place of Presentation: Gniezno, Poland(招待講演)
  • Year and Date: 2011-09-26
• [Presentation] 分子性ダイマーモット絶縁体に現れる誘電異常 (2010)
  • Author(s): 佐々木孝彦
  • Organizer: 誘電体研究会「相関電子系における電荷秩序と誘電異常-遷移金属酸化物と分子性化合物の最近の展開-」
  • Place of Presentation: 青山学院大学
  • Year and Date: 2010-11-26
• [Presentation] κ型BEDT-TTF分子系有機導体のモット転移近傍における強相関電子状態 (2010)
  • Author(s): 佐々木孝彦
  • Organizer: 理研「分子アンサンブル2010」シンポジウム
  • Place of Presentation: 理化学研究所
  • Year and Date: 2010-11-16
• [Presentation] 分子性ダイマーモット絶縁体に現れる誘電異常 (2010)
  • Author(s): 佐々木孝彦
  • Organizer: 日本物理学会2010年秋季大会招待講演シンポジウム「やわらかい電荷秩序の得意な誘電性・伝導性と外場制御」
  • Place of Presentation: 大阪府立大学
  • Year and Date: 2010-09-23
• [Presentation] 分子性ダイマーモット絶縁体に現れる誘電異常 (2010)
  • Author(s): 佐々木孝彦
  • Organizer: 日本物理学会2010年秋季大会
  • Place of Presentation: 大阪府立大学
  • Year and Date: 2010-09-23
• [Presentation] Enhancement of localization effect near Mott transition in κ-(BEDT-TTF)_2X (2010)
  • Author(s): T. Sasaki
  • Organizer: International Conference on Science and Technology of Synthetic Metals 2010
  • Place of Presentation: Kyoto International Conference Center
  • Year and Date: 2010-07-05
• [Presentation] エックス線照射したκ-(BEDT-TTF)_2Cu[N(CN)_2]Brの赤外反射測定 (2010)
  • Author(s): 菅原洋紀
  • Organizer: 日本物理学会第65回年次大会
  • Place of Presentation: 岡山大学
  • Year and Date: 2010-03-22
• [Presentation] 有機超伝導体κ-(BEDT-TTF)_2Cu[N(CN)_2]Brのエックス線照射による絶縁体化 (2010)
  • Author(s): 佐野康一郎
  • Organizer: 日本物理学会第65回年次大会
  • Place of Presentation: 岡山大学
  • Year and Date: 2010-03-22
• [Presentation] Disorder effects on the Mott transition in organic conductors (2010)
  • Author(s): T. Sasaki
  • Organizer: International Symposium on Novel states in correlated condensed matter from model systems to real materials
  • Place of Presentation: Harnack-Haus, Berlin, Germany
  • Year and Date: 2010-03-03
• [Presentation] Disorder effects on the Mott transition in organic conductors. (2010)
  • Author(s): Takahiko Sasaki
  • Organizer: International Symposium on Novel states in correlated condensed matter- from model systems to real materials-
  • Place of Presentation: Berlin, Germany
  • Year and Date: 2010-03-03
• [Presentation] Enhancement of localization effect near Mott transition in κ-(BEDT-TTF)_2X (2010)
  • Author(s): T.Sasaki
  • Organizer: International Conference on Science and Technology of Synthetic Metals 2010
  • Place of Presentation: Kyoto International Conference Center.(selected oral contribution).
• [Presentation] Disorder effects on the Mott transition in organic conductors. (2010)
  • Author(s): T.Sasaki
  • Organizer: International Symposium on "Novel states in correlated condensed matter- from model systems to real materials-
  • Place of Presentation: Harnack-Haus,Berlin, Germany.(invited lecture)
• [Presentation] Metal-Insulator Transition induced by Disorders in Organic Superconductor κ-(BEDT-TTF)_2Cu[N(CN)_2] Br (2009)
  • Author(s): T. Sasaki
  • Organizer: The 8th International symposium on Crystalline Organic Metals, Superconductors and Ferromagnets (ISCOM 2009)
  • Place of Presentation: Niseko, Hokkaido, Japan
  • Year and Date: 2009-09-16
• [Presentation] Metal-Insulator Transition induced by Disorders in Organic Supercond uctor κ-(BEDT-TTF)_2Cu[N(CN)_2]Br. (2009)
  • Author(s): Takahiko Sasaki
  • Organizer: The 8th International symposium on Crystalline Organic Metals, Superconductors and Ferromagnets
  • Place of Presentation: 北海道ニセコ
  • Year and Date: 2009-09-15
• [Presentation] κ-(BEDT-TTF)_2Cu_2(CN)_3におけるT*近傍での静磁化測定 (2009)
  • Author(s): 米山直樹
  • Organizer: 日本物理学会第64回年会
  • Place of Presentation: 立教大学
  • Year and Date: 2009-03-28
• [Presentation] BEDT-TTF系有機導体へのエックス線照射効果 (2009)
  • Author(s): 佐々木孝彦
  • Organizer: 日本物理学会第64回年会
  • Place of Presentation: 立教大学
  • Year and Date: 2009-03-28
• [Presentation] エックス線照射したモット系有機導体におけるホール効果測定 (2009)
  • Author(s): 佐野康一郎
  • Organizer: 日本物理学会第64回年会
  • Place of Presentation: 立教大学
  • Year and Date: 2009-03-28
• [Presentation] Metal-Insulator Transition induced by Disorders in Organic Superconductor κ-(BEDT-TTF)_2Cu[N(CN)_2]Br. (2009)
  • Author(s): T.Sasaki
  • Organizer: The 8th International symposium on Crystalline Organic Metals, Superconductors and Ferromagnets (ISCOM 2009)
  • Place of Presentation: Niseko, Hokkaido, Japan.(selected oral contribution)
• [Presentation] Optical probe of carrier doping effect by X-ray irradiation in organic dimer-Mott insulator (2008)
  • Author(s): T. Sasaki
  • Organizer: The international symposium on.anomalo us quantum materials ISAQM2008
  • Place of Presentation: 東京大学
  • Year and Date: 2008-11-08
• [Presentation] 有機モット絶縁体κ-(BEDT-TTF)_2Cu_2(CN)_3のスピン液体状態における熱輸送II (2008)
  • Author(s): 中田宣人
  • Organizer: 日本物理学会2008年秋季大会
  • Place of Presentation: 岩手大学
  • Year and Date: 2008-09-23
• [Presentation] κ-(BEDT-TTF)_2Xの準粒子散乱と超伝導抑制 (2008)
  • Author(s): 佐々木孝彦
  • Organizer: 日本物理学会2008年秋季大会
  • Place of Presentation: 岩手大学
  • Year and Date: 2008-09-23
• [Presentation] κ-(BEDT-TTF)_2Cu(NCS)_2のBMDT-TTF置換による不純物効果 (2008)
  • Author(s): 米山直樹
  • Organizer: 日本物理学会2008年秋季大会
  • Place of Presentation: 岩手大学
  • Year and Date: 2008-09-23
• [Presentation] X線照射したκ-(BEDT-TTF)_2Cu[N(CN)_2]Clでの静磁化測定 (2008)
  • Author(s): 米山直樹
  • Organizer: 日本物理学会2008年秋季大会
  • Place of Presentation: 岩手大学
  • Year and Date: 2008-09-23
• [Presentation] 赤外光学反射測定によるκ-(BEDT-TTF)_2Cu[N(CN)_2]Clのエックス線照射効果 (2008)
  • Author(s): 佐々木孝彦
  • Organizer: 日本物理学会2008年秋季大会
  • Place of Presentation: 岩手大学
  • Year and Date: 2008-09-23
• [Presentation] ダイマーモット型絶縁体κ-(BEDT-TTF)_2Xにおける光誘起相転移の励起波長依存性 (2008)
  • Author(s): 川上洋平
  • Organizer: 日本物理学会2008年秋季大会
  • Place of Presentation: 岩手大学
  • Year and Date: 2008-09-21
• [Presentation] Disorder effect on superconductivity in organic superconductor κ-(BEDT-TTF)_2Cu(NCS)_2 (2008)
  • Author(s): T. Sasaki
  • Organizer: Low Temperature Physics LT25
  • Place of Presentation: Amsterdam, Netherland
  • Year and Date: 2008-08-08
• [Presentation] Competition between Mott transition and superconductivity under magnetic fields in strongly correlated organic superconductor κ-(BEDT-TTF)_2Cu[N(CN)_2]Br (2008)
  • Author(s): T. Sasaki
  • Organizer: Low Temperature Physics LT25
  • Place of Presentation: Amsterdam, Netherland
  • Year and Date: 2008-08-08
• [Presentation] Optical probe of carrier doping effect by X-ray irradiation in organic dimer-Mott insulator (2008)
  • Author(s): T. Sasaki
  • Organizer: International Symposium on Molecular Conductors ISMC2008
  • Place of Presentation: 愛知県岡崎市
  • Year and Date: 2008-07-23
• [Book] Molecular Electronic and Related Materials-Control and Probe with Light-(Ed. T. Naito) (2010)
  • Author(s): T. Sasaki
  • Publisher: Transworld Research Network Inc.
• [Book] Molecular Electronic and Related Materials-Control and Probe with Light- (Ed.T.Naito) (2010)
  • Author(s): T.Sasaki
  • Publisher: Transworld Research Network Inc.
• [Book] 金属材料の最前線ブルーバックス(B1643)(東北大学金属材料研究所編著) (2009)
  • Author(s): 佐々木孝彦
  • Publisher: (株)講談社
• [Book] 金属材料の最前線 ブルーバックス(B1643)(東北大学金属材料研究所編著) (2009)
  • Author(s): 佐々木孝彦
  • Publisher: (株)講談社
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