Marginal Paramagnetic State of a One-Dimensional Half-Filled Alternating Chain in (TTM-TTP) AuI_2 : Condensed Matter: Electronic Properties, etc.

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概要

• 論文の詳細を見る

• (TTM-TTP)AuI_2 (TTM-TTP: 2,5-bis[4,5-bis(methylthio)-1,3-dithiol-2-ylidene]-1,3,4,6-tetra-thiapentalene) has a dimerized structure along the donor stacking direction, and shows semi-conducting behavior below room temperature. ESR, static magnetic susceptibility, and optical reflectance of this salt have been measured to investigate the spin state and the electronic correlation. The ESR signal has been observed from room temperature to 3 K, and the spin susceptibility shows paramagnetic behavior with a rapid decrease below 10 K. The static magnetic susceptibility is paramagnetic and has an anomaly around 10 K in agreement with the ESR result. The chain axis optical reflectance spectra show clear optical gap in the mid-infrared region. An attempt is undertaken to analyze the optical spectrum by means of the one-dimensional dimerized Hubbard model, which suggests that the on-site Coulomb repulsion, U, is small and the spin polarization is located at the marginal paramagnetic boundary. These results indicate that this compound is not a band-insulator but the Mott insulator with a small spin gap.

• 社団法人日本物理学会の論文
• 2000-12-15

著者

• 瀧宮 和男

  広島大工

• Tanaka Kazuyoshi

  Department of Biofunctional Informatics, Graduate School of Health Care Sciences, Tokyo Medical and

• KAWAMOTO Tadashi

  Department of Organic and Polymeric Materials, Graduate School of Science and Engineering, Tokyo Ins

• MORI Takehiko

  Department of Organic and Polymeric Materials, Graduate School of Science and Engineering, Tokyo Ins

• MISAKI Yohji

  Department of Molecular Engineering, Graduate School of Engineering, Kyoto University

• YAMOTO Takashi

  Institute for Solid State Physics, The University of Tokyo

• TAJIMA Hiroyuki

  nstitute for Solid State Physics, The University of Tokyo

• Yamamoto S

  Japan Atomic Energy Research Institute Department Of Fusion Plasma Research Experimental Plasma Phys

• Misaki Yohji

  Department Of Applied Chemistry Graduate School Of Engineering Ehime University

• Misaki Y

  Department Of Molecular Engineering Graduate School Of Engineering Kyoto University

• Misaki Yohji

  Department Of Molecular Engineering Graduate School Of Engineering Kyoto University

• Misaki Yohji

  Department Of Applied Chemistry Graduate School Of Science And Engineering Ehime University And Cres

• Yamabe T

  Tokyo Inst. Technol. Tokyo Jpn

• Mori Takehiko

  Department Of Organic And Polymeric Materials Graduate School Of Science And Engineering Tokyo Insti

• Kawamoto Tohru

  Nanotechnology Research Institute (nri) And Research Consortium For Synthetic Nano-function Material

• Yamamoto T

  Department Of Applied Chemistry Himeji Institute Of Technology

• Yamamoto T

  Institute For Solid State Physics The University Of Tokyo

• Yasuda T

  Graduate School Of Science Osaka University

• Misaki Yohji

  Division Of Molecular Engineering Graduate School Of Engineering Kyoto University

• Yamamoto T

  Tsukuba Research Center Sanyo Electric Co. Ltd.

• Yamauchi Toshihiko

  Division Of Thermonuclear Fusion Research Japan Atomic Energy Research Institute

• Kawamoto Tadashi

  Department Of Organic And Polymeric Materials Graduate School Of Science And Engineering Tokyo Insti

• Yamamoto Tokujirou

  Department Of Materials Science And Engineering Kyoto University

• Yamamoto T

  Japan Atomic Energy Research Inst. Tokai

• Yamamoto T

  Institute For Molecular Science And Graduate University For Advanced Studies:(present Office)riken

• Kawamoto T

  Department Of Organic And Polymeric Materials Graduate School Of Science And Engineering Tokyo Insti

• Tanaka Kazuyoshi

  Department Of Biofunctional Informatics Graduate School Of Health Care Sciences Tokyo Medical And De

• Yamamoto Takayoshi

  The Institute Of Scientific And Industrial Research Osaka University

• Mori Takehiko

  Department Of Hematology Tokyo Women's Medical University

• Yamamoto Takashi

  Institute For Molecular Science

• Mori Takehiko

  Department of Chemistry and Materials Science, Tokyo Institute of Technology, Meguro, Tokyo 152-8552, Japan

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