Thermodynamic Study of an Incommensurate Organic Superconductor (MDT-TSF)(AuI_2)_<0.436>(Condensed matter: structure and mechanical and thermal properties)
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概要
- 論文の詳細を見る
Low-temperature heat capacity measurements are performed on the organic superconductor (MDTTSF)(AuI_2)_<0.436>; its critical temperature determined by the transport measurement is 4.5K. A broad but reproducible thermal anomaly related to the superconducting transition is observed during precise measurements of the heat capacity under magnetic fields of up to 6 T. An important finding is that almost 60% of the normal electron density of states remains even in the superconducting ground state. This phenomenon and the intrinsic broadening of the thermal anomaly are common to another organic superconductor k-(BEDT-TTF)_4Hg_<2.89>Br_8, in which an incommensurate relationship exists between anion and donor lattices. However, it is emphasized that (MDT-TSF)(AuI_2)_<0.436> exhibits the superconducting transition at a relatively high temperature despite the small electronic heat capacity coefficient γ and non-dimerized molecular arrangement in the donor layers.
- 2006-07-15
著者
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ISHIKAWA Tetsushi
Department of Chemistry, Graduate School of Science and Engineering, Tokyo Institute of Technology
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NAKAZAWA Yasuhiro
Department of Chemistry, Graduate School of Science, Osaka University
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YAMASHITA Satoshi
Department of Chemistry, Graduate School of Science and Engineering, Tokyo Institute of Technology
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OGUNI Masaharu
Department of Chemistry, Graduate School of Science and Engineering, Tokyo Institute of Technology
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SAITO Kazuya
Department of Chemistry, Graduate School of Pure and Applied Sciences, University of Tsukuba
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TAKIMIYA Kazuo
Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University
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OTSUBO Tetsuo
Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University
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Takimiya Kazuo
Department Of Applied Chemistry Faculty Of Engineering Hiroshima University
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Otsubo Tetsuo
Department Of Applied Chemistry Faculty Of Engineering Hiroshima University
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Saito Kazuya
Department Of Aeronautics And Astronautics Graduate School Kyoto University
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Oguni Masaharu
Department Of Chemistry Graduate School Of Science And Engineering Tokyo Institute Of Technology
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Oguni Masaharu
Department Of Chemistry Faculty Of Science Tokyo Institute Of Technology
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Nakazawa Yasuhiro
Department Of Chemistry Graduate School Of Science Osaka University:crest-jst
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Yamashita Satoshi
Department Of Chemistry Graduate School Of Science Osaka University
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Yamashita Satoshi
Department Of Chemistry Graduate School Of Science Hokkaido University
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Yamashita Satoshi
Department Of Biochemistry And Engineering Graduate School Of Engineering Tohoku University
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Oguni Masaharu
Department of Chemistry and Chemical Thermodynamics Laboratory, Faculty of Science, Osaka University
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