Quantum Criticality in Reduced π-Donor System (MeDH-TTP)_2AsF_6(Condensed matter: electronic structure and electrical, magnetic, and optical properties)

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概要

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• The temperature-pressure (T-P) phase diagram of the reduced π-donor system (MeDH-TTP)_2AsF_6 is studied using resistivity measurement, where MeDH-TTP stands for 2-methyl-5-(1,3-dithiolan-2-yliden)-1,3,4,6-tetrathiapentalene. The insulating phase is suppressed completely beyond P_c=2.4GPa. Above P_c, we find two distinct metallic states that are regarded as the Fermi liquid (FL) state at lower temperatures and the "bad metal" at higher temperatures. Around P_c, remarkable enhancements in the residual resistivity ρ_0 as well as in the T^2-term coefficient A associated with FL behavior are found. We discuss the origin of the insulating phase and the possible quantum critical point at P_c in (MeDH-TTP)_2 AsF_6.

• 社団法人日本物理学会の論文
• 2006-08-15

著者

• KUME Kiyoshi

  Division of Gastroenterology, Tohoku University Graduate School of Medicine

• Kobayashi K

  Department Of Pure And Applied Sciences Graduate School Of Arts And Sciences The University Of Tokyo

• Kume K

  Tokyo Metropolitan Univ. Tokyo

• Kume Kiyoshi

  Division Of Gastroenterology Tohoku University Graduate School Of Medicine

• Murata K

  Department Of Organic And Polymeric Materials Tokyo Institute Of Technology

• Honda Y

  Tohoku Univ. Sendai

• Yoshino Harukazu

  Department Of Material Science Faculty Of Science Osaka City University

• Murata Keizo

  Department of Material Science,Faculty of Science,Osaka City University

• Nojiri Hiroyuki

  Graduate School Of Pure And Applied Sciences University Of Tsukuba

• YASUZUKA Syuma

  Department of Applied Physics, Hokkaido University

• Kobayashi Kensuke

  Department of Cardiovascular Surgery, Tokyo Women's Medical University

• Murata K

  Electrotechnical Laboratory

• Murata Keizo

  Department Of Material Science Graduate School Of Science Osaka City University

• Murata K

  Department Of Material Science Graduate School Of Science Osaka City University

• Murata Keizo

  Osaka City University

• Yasuzuka Syuma

  Division Of Molecular Materials Science Graduate School Of Science Osaka City University

• Yasuzuka Syuma

  Department Of Applied Physics Hokkaido University:(present Address)department Of Molecular Materials

• Maruyama K

  Faculty Of Science Niigata University

• Maruyama K

  Department Of Physics Faculty Of Science Kyoto University

• Maruyama Kenji

  Graduate School Of Science And Technology Niigata University

• Kikuchi K

  Department Of Chemistry Tokyo Metropolitan University

• Kikuchi Kazuo

  Department Of Electrical Engineering Nagoya University

• Nishikawa H

  Graduate School Of Pure And Applied Sciences University Of Tsukuba

• Nishikawa H

  Tokyo Metropolitan Univ. Tokyo Jpn

• Nishikawa H

  Department Of Pharmacology Faculty Of Pharmaceutical Sciences Kinki University

• NISHIKAWA Hiroyuki

  Graduate School of Pure and Applied Sciences, University of Tsukuba

• Kume K

  Department Of Physics Tokyo Metropolitan University

• Kobayashi Kensuke

  Department Of Cardiovascular Surgery The Heart Institute Of Japan Tokyo Women's Medical Univers

• Murata K

  Division Of Molecular Materials Science Graduate School Of Science Osaka City University

• Murata K

  Tokyo Medical And Dental Univ. Tokyo Jpn

• Yoshino Hajime

  Institute For Solid State Physics The University Of Tokyo

• Nishikawa Hiroyuki

  Graduate School Of Pure And Applied Sciences University Of Tsukuba

• MATSUTANI Katsuhiro

  Tokuyama Soda Co. Ltd.

• Kikuchi K

  Tokyo Gas Co. Ltd. Yokohama Jpn

• Kajimura K

  Electrotechnical Laboratory

• Kajimura Koji

  Electrotechnical Laboratory Tsukuba Research Center

• Murata Keiichi

  Department Of Neurophysiology Medical Research Institute Tokyo Medical And Dental University

• Yoshino H

  Division Of Molecular Materials Science Graduate School Of Science Osaka City University

• Yoshino Harukazu

  Department Of Material Science Graduate School Of Science Osaka City University

• Kajimura Koji

  Electrotgechnical Laboratory Mukodai

• Murata Keizo

  Department Of Material Science Graduate School Of Science Osaka City Uneversity

• Yoshino H

  Graduate School Of Science Osaka City University

• Yoshino Harukazu

  Division Of Molecular Materials Science Graduate School Of Science Osaka City University

• Murata Keizo

  Department Of Material Science Faculty Of Science Osaka City University

• Honda Y

  Osaka Univ. Suita Jpn

• Yasuzuka Syuma

  Osaka City Univ. Osaka

• Yasuzuka Syuma

  Department Of Applied Physics Hokkaido University

• Maruyama Kenji

  Graduate School of Science, Osaka City University

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