π-d Correlation in λ-(BEDT-TSF)_2Fe_<1-x>Ga_xCl_4 by ESR Measurements(Condensed matter: electronic structure and electrical, magnetic, and optical properties)
スポンサーリンク
概要
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Electron spin resonance experiments with 15.4 GHz microwave have been performed on λ-(BEDT-TSF)_2Fe_<1-x>Ga_xCl_4 (x=0.0, 0.4, and 1.0) single crystals at various temperatures down to 1.5K, where BEDT-TSF denotes bis (ethylenedithio) tetraselena-fulvalene. For λ-(BEDT-TSF)_2GaCl_4, the resonance signal due to π-electrons at the BEDT-TSF molecule layer is observed. For λ-(BEDT-TSF)_2Fe_<0.6>Ga_<0.4>Cl_4, signals which originate both from π-electrons at the BEDT-TSF molecule layer and from d-electrons at Fe ions are observed. For λ-(BEDT-TSF)_2FeCl_4, only one resonance signal is observed. The magnetic field direction dependencies of the g-value do not show the symmetry of the conducting ac-plane above 20K. This means that the observed signals are not mainly due to the π-electrons at the BEDT-TSF molecule layer but due to the d-electrons at Fe ions. The resonance due to the π-electrons is expected to be renormalized by the strong correlation between the π-and d-electrons. The anomaly has been observed in the g-value as well as the line width both for λ-(BEDT-TSF)_2FeCl_4 at around 70K and for λ-(BEDT-TSF)_2Fe_<0.6>Ga_<0.4>Cl_4 at around 95K. This might be correlated to the dielectric and structural anomaly observed for λ-(BEDT-TSF)_2FeCl_4.
- 2006-10-15
著者
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KAWAMATA Shuichi
Department of Physics and Electronics, Osaka Prefecture University
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KIZAWA Toshikazu
Department of Physics and Electronics, Osaka Prefecture University
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SUZUKI Takahiro
Physics Department, Graduate School of Science, Tohoku University
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NEGISHI Eiichi
Physics Department, Graduate School of Science, Tohoku University
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MATSUI Hiroshi
Physics Department, Graduate School of Science, Tohoku University
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TOYOTA Naoki
Physics Department, Graduate School of Science, Tohoku University
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ISHIDA Takekazu
Department of Physics and Electronics, Osaka Prefecture University
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Takagi S
Physics Department Graduate School Of Science Tohoku University
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Hedo M
Institute For Solid State Physics University Of Tokyo
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Matsui H
Graduate School Of Science Osaka University
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Takagi Shigeru
Physics Department Graduate School Of Science Tohoku University
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Toyota N
Physics Department Graduate School Of Science Tohoku University
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Namiki Takahisa
Institute For Materials Research Tohoku University
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Toyota Naoki
Physics Department Graduate School Of Science Tohoku University
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Toyota Naoki
Physics Department Graduate School Of Science Tohoku University:center For Interdisciplinary Researc
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Negishi E
Physics Department Graduate School Of Science Tohoku University
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Negishi Eiichi
Physics Department Graduate School Of Science Tohoku University
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Tateiwa Naoyuki
Graduate School Of Science Tohoku University:(present) Department Of Physical Science Graduate Schoo
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Minaguchi Hiroshi
Department Of Obstetrics And Gynecology Yokohama City University School Of Medicinedepartment Of Obs
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Kawamata Shuichi
Department Of Physics And Electronics Osaka Prefecture University:jst-crest
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Kawamata Shuichi
Department Of Physics And Electronics Osaka Prefecture University
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Ishida Takekazu
Department Of Physics And Electronics Osaka Prefecture University
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Ishida Takekazu
Department Of Physics And Electronics Osaka Prefecture University:jst-crest
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Matsui Hiroshi
Graduate School Of Science Osaka University
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Kizawa Toshikazu
Department Of Physics And Electronics Osaka Prefecture University:jst-crest
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Mukuda Hidekazu
Graduate School Of Science Osaka University
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Matsui Hiroshi
Physics Department Graduate School Of Science Tohoku University:center For Interdisciplinary Researc
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Matsui Hiroshi
Physics Department Graduate School Of Science Tohoku University
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Muranaka Hiroshi
Graduate School Of Science Osaka University
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Matsui Hiroshi
Physics Department Graduate School Of Science Tohoku University:center For Interdisciplinary Researc
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Terada N
Musashi Inst. Technology Tokyo
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