Pressure Effect on the π-d Interaction in (EDT-DSDTFVSDS)_2FeBr_4(Condensed matter: electronic structure and electrical, magnetic, and optical properties)
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概要
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Electronic properties of the π-d system (EDT-DSDTFVSDS)_2FeBr_4 are investigated under high pressure up to 6.5GPa, where EDT-DSDTFVSDS = ethylenedithiodiselenadithiafulvalenothioquinone-1,3-diselenolemethide. In order to extract the π-d interaction, the nonmagnetic anion analogue salt (EDT-DSDTFVSDS)_2GaBr_4 is also investigated for comparison. Both salts show metallic electrical resistivity at high temperature, but exhibit insulating behaviors in two pressure regions, in the low-pressure region, i.e., [P<3.5GPa (2.0GPa)] for the FeBr_4 (GaBr_4) salts, as well as in the high-pressure region, i.e., (P>3.0GPa) for both salts. Below 3.5GPa, the low-pressure insulating state of the FeBr_4 salt is enhanced by the π-d interaction. Whereas, the high-pressure insulating state of the FeBr_4 salt is not enhanced above 3.5GPa. On the other hand, the π-d interaction may affect the nonmetallic behavior of the resistance above 200K in the FeBr_4 salt owing to the scattering of π electrons from thermally fluctuating d spins.
- 社団法人日本物理学会の論文
- 2009-01-15
著者
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Murata K
Department Of Organic And Polymeric Materials Tokyo Institute Of Technology
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Honda Y
Tohoku Univ. Sendai
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Yoshino Harukazu
Department Of Material Science Faculty Of Science Osaka City University
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Murata Keizo
Division Of Molecular Materials Science Graduate School Of Science Osaka City University
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Murata K
Electrotechnical Laboratory
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Murata K
Department Of Material Science Graduate School Of Science Osaka City University
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Murata Keizo
Osaka City University
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Maruyama K
Department Of Physics Faculty Of Science Kyoto University
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MURATA Kazuhiro
Electrotechnical Laboratory
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SUGIMOTO Toyonari
Department of Chemistry, Graduate School of Science, Osaka Prefecture University and CREST, JST
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Murata Kazuhiro
Department Of Physics Division Of Material Science Nagoya University
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Murata K
Division Of Molecular Materials Science Graduate School Of Science Osaka City University
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Murata K
Tokyo Medical And Dental Univ. Tokyo Jpn
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Yoshino Hajime
Institute For Solid State Physics The University Of Tokyo
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Sugimoto Toyonari
Department Of Chemistry Graduate School Of Science Osaka Prefecture University
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Sugimoto Toyonari
Department Of Chemistry Graduate School Of Science Osaka Prefecture University And Crest Jst
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MATSUTANI Katsuhiro
Tokuyama Soda Co. Ltd.
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Murata Keiichi
Department Of Neurophysiology Medical Research Institute Tokyo Medical And Dental University
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HAYASHI Toshiki
Department of Chemistry, Graduate School of Science, Osaka Prefecture University
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FUJIMOTO Tsutomu
Division of Molecular Materials Science, Graduate School of Science, Osaka City University
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YOSHINO Harukazu
Division of Molecular Materials Science, Graduate School of Science, Osaka City University
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Hayashi Toshiki
Department Of Chemistry Graduate School Of Science Osaka Prefecture University
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Yoshino H
Division Of Molecular Materials Science Graduate School Of Science Osaka City University
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Yoshino Harukazu
Department Of Material Science Graduate School Of Science Osaka City University
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Fujimoto Tsutomu
Division Of Molecular Materials Science Graduate School Of Science Osaka City University
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Yoshino H
Graduate School Of Science Osaka City University
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Yoshino Harukazu
Division Of Molecular Materials Science Graduate School Of Science Osaka City University
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Honda Y
Osaka Univ. Suita Jpn
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Maruyama Kenji
Graduate School of Science, Osaka City University
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