Observation of Charge 0rdering in Organic Dielectric Compounds using Time Resolved Synchrotron Radiation

2011 Fiscal Year Final Research Report

• Project/Area Number: 21540323
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Condensed matter physics I
• Research Institution: Okayama University
• Principal Investigator: NOGAMI Yoshio 岡山大学, 大学院・自然科学研究科, 教授 (10202251)
• Co-Investigator(Kenkyū-buntansha): IKEDA Naoshi 岡山大学, 大学院・自然科学研究科, 教授 (00222894)
• Project Period (FY): 2009 – 2011
• Keywords: 時分割計測 / X線・粒子線 / 電荷秩序 / 強相関 / 有機導体 / 低次元導体 / 電荷密度波交差物性

Research Abstract

Organic thyristor showing giant non-linear conduction leading particular DC-AC current conversion was caused by the melting of the charge ordering by electronic current. Since, the charge ordering can produce organic dielectric materials, the realization of melting and reordering process of the charge ordering is very important to develop organic ferroelectrics. We observed variation of the two competing charge ordering and the time constant of melting and freezing for two fold charge ordering is more than several ten msec using Synchrotron Radiation under current.

Research Products

• [Journal Article] Successive transition in Rare-earth intermetallic compound GdNiC_2 (2011)
  • Author(s): N. Hanasaki, K. Mikami, S. Torigoe, Y. Nogami, 他3名
  • Journal Title: Journal of Physics : Conference Series Volume: 320巻 Pages: 012072-5
  • Peer Reviewed
• [Journal Article] X-ray Absorption Spectra in Pyrochlore Niobates (2011)
  • Author(s): S. Torigoe, Y. Ishimoto, N. Hanasaki, Y. Nogami, 他4名
  • Journal Title: Journal of Physics : Conference Series Volume: 320巻 Pages: 012078-11
  • Peer Reviewed
• [Journal Article] Relaxation of Geometrical Frustration in NbSe_3 Topological Crystals (2010)
  • Author(s): T. Tsuneta, K. Yamamoto, N. Ikeda, Y. Nogami, 他
  • Journal Title: Phys. Rev. B Volume: 82巻 Pages: 14105-10
  • Peer Reviewed
• [Journal Article] Field-Induced Successive Phase Transitions in the Charge Density Wave Organic Conductor HMTSF-TCNQ (2010)
  • Author(s): K. Murata, K. Yokogawa, K. Kobayashi, K. Masuda, T. Sasaki, Y. Seno, N. R. Tamilselvan, H. Yoshino, J. S. Brooks, D. Jerome, K. Bechgaard, M. Uruichi, K. Yakushi, Y. Nogami, and R. Kato
  • Journal Title: J. Phys. Soc. Jpn. Volume: 79巻 Pages: 103702-5
  • Peer Reviewed
• [Journal Article] Nonequilibrium charge ordering inθ-(BEDT-TTF)_2 MM'(SCN)_4(M=Rb, Cs ; M'=Zn, Co) (2010)
  • Author(s): I. Terasaki, S. Tasaki, A. Ajisaka, Y. Nogami, N. Hanasaki, W. Watanabe, H. Mori and T. Mori
  • Journal Title: Physica B Volume: 405巻 Pages: S217-S220
  • Peer Reviewed
• [Journal Article] Pressure effect on the competing charge-ordering phase transition inθ-(BEDT-TTF)_2 CsZn(SCN)_4 (2010)
  • Author(s): M. Watanabe, M. Osanai, Y. Dohi, Y. Ishikawa, Y. Noda, Y. Nogami, I. Terasaki, H. Mori and T. Mori
  • Journal Title: Physica B Volume: 405巻 Pages: S229-S230
  • Peer Reviewed
• [Journal Article] Charge Order Competition Leading to Nonlinearity in Organic Thyristor Family (2010)
  • Author(s): Yoshio NOGAMI, 他11名
  • Journal Title: J. Phys. Soc. Jpn. Volume: 79巻 Pages: 44606-10
  • Peer Reviewed
• [Journal Article] (2010)
  • Author(s): Ryusuke Kondo, Momoka Higa, Seiichi Kagoshima, Noriaki Hanasaki and Yoshio Nogami and Hiroyuki Nishikawa
  • Journal Title: Phys. Rev. B Volume: 81巻 Pages: 24519-28
  • Peer Reviewed
• [Journal Article] (2009)
  • Author(s): Fumiaki Sawano, Tomohiro Suko, Taichi S. Inada, Shuichi Tasaki, Ichiro Terasaki, Hatsumi Mori, Takehiko Mori, Yoshio Nogami, Naoshi Ikeda, Masashi Watanabe, and Yukio Noda
  • Journal Title: J. Phys. Soc. Jpn. Volume: 78巻 Pages: 24714-8
  • Peer Reviewed
• [Presentation] θ-(BEDT-TTF) 2CsZn(SCN) 4の一軸圧縮下の変調波数と物性 (2012)
  • Author(s): 野上由夫, 他4名
  • Organizer: 日本物理学会
  • Place of Presentation: 関西学院大学
  • Year and Date: 2012-03-26
• [Presentation] NdNiC2単結晶による電荷密度波の観測と磁気抵抗 (2012)
  • Author(s): 松本昇紘, 山本伸樹, 野上由夫, 他2名
  • Organizer: 日本物理学会
  • Place of Presentation: 関西学院大学
  • Year and Date: 2012-03-26
• [Presentation] DyNiC2およびCeNiC2単結晶による電荷密度波の観測と磁気抵抗 (2012)
  • Author(s): 前田浩之, 山本伸樹, 野上由夫, 他2名
  • Organizer: 日本物理学会
  • Place of Presentation: 関西学院大学
  • Year and Date: 2012-03-26
• [Presentation] RNiC_2(R=Tb, Gd)の放射光X線回折 (2012)
  • Author(s): 下村晋, 野上由夫, 他6名
  • Organizer: 日本物理学会
  • Place of Presentation: 関西学院大学
  • Year and Date: 2012-03-25
• [Presentation] 希土類化合物GdNiC2の磁場中相図と変調構造II (2011)
  • Author(s): 三上和幸, 横田研太郎, 野上由夫, 他5名
  • Organizer: 日本物理学会
  • Place of Presentation: 富山大学
  • Year and Date: 2011-09-22
• [Presentation] X線回折・散漫散乱によるGdNiC2の逐次転移の観測 (2011)
  • Author(s): 下村晋, 野上由夫, 他6名
  • Organizer: 日本物理学会
  • Place of Presentation: 富山大学
  • Year and Date: 2011-09-22
• [Presentation] Development of highly sensitive X-ray camera under Magnetic field and its application to the low-dimensional quantum-spin system CuGe_<1-x> Si_xO_3 (2010)
  • Author(s): Y. Zhang, Morigensudu, N. Hanasaki and Y. Nogami
  • Organizer: The 11th Asia Pacific Physics Conference
  • Place of Presentation: Shanghai, China
  • Year and Date: 20101114-18
• [Presentation] 希土類化合物GdNiC2の磁場中相図 (2010)
  • Author(s): 三上和幸, 花咲徳亮, 横田研太郎, 野上由夫, 他3名
  • Organizer: 日本物理学会
  • Place of Presentation: 大阪府立大学
  • Year and Date: 20101114-18
• [Presentation] パイロクロア型Nb酸化物におけるX線吸収スペクトルと強誘電性 (2010)
  • Author(s): 鳥越秀平, 奈良晋太郎, 花咲徳亮, 野上由夫, 他3名
  • Organizer: 日本物理学会
  • Place of Presentation: 大阪府立大学
  • Year and Date: 20101114-18
• [Presentation] θ-(BEDT-TTF)_2RbZn(SCN)_4の超急冷後の低温電荷秩序構造と非線形伝導 (2010)
  • Author(s): 野上由夫, 他8名
  • Organizer: 日本物理学会
  • Place of Presentation: 岡山大学
  • Year and Date: 2010-03-20
• [Presentation] β"-(BEDT-TTF)(TCNQ)の低温超格子構造 (2009)
  • Author(s): 小椋美鈴, 花咲徳亮, 野上由夫, 他3名
  • Organizer: 日本物理学会
  • Place of Presentation: 熊本大学
  • Year and Date: 2009-09-25
• [Presentation] Pressure Effect on the Competing Charge Ordered States inθ-(BEDT-TTF)_2CsZn(SCN)_4 (2009)
  • Author(s): M. Watanabe, M. Osanai, Y. Dohi, Y. Noda, Y. Nogami, 他3人
  • Organizer: The 8th International Symposium on Crystalline Organic Metals, Superconductors and Ferromagnets(ISCOM 2009)
  • Place of Presentation: Niseko, Japan
  • Year and Date: 2009-09-14
• [Presentation] Competition of Two Charge Ordering Domains inθ-(BEDT-TTF)_2RbZn(SCN)_4 (2009)
  • Author(s): Yoshio Nogami
  • Organizer: The 8th International Symposium on Crystalline Organic Metals, Superconductors and Ferromagnets(ISCOM 2009)
  • Place of Presentation: Niseko, Japan
  • Year and Date: 2009-09-14
• [Presentation] Low Temperature Super-lattice Structure inβ"-(BEDT-TTF)(TCNQ) (2009)
  • Author(s): M. Ogura, N. Hanasaki, Y. Nogami, 他3人
  • Organizer: The 8th International Symposium on Crystalline Organic Metals, Superconductors and Ferromagnets(ISCOM 2009)
  • Place of Presentation: Niseko, Japan
  • Year and Date: 2009-09-13
• [Remarks]
  • URL: http://www.physics.okayama-u.ac.jp/nogami_homepage/n/