Determination of Band-filling Change in the Two-dimensional Organic Conductor, τ-(EDO-S, S-DMEDT-TTF)_2(AuBr_2)_<1+y>, (y≤0.875) by the Quantum Oscillation of Magnetoresistance(Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Pr
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概要
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The effect of thermal treatment on the transport properties is studied for a two-dimensional organic conductor τ-(EDO-S, S-DMEDT-TTF)_2(AuBr_2)_<1+y>, (y≤0.875). The temperature dependence of the electric resistivity below room temperature was found to be changed from metallic down to low temperature to semiconducting by heating up to 420K. One of the two frequencies of Shubnikovde Haas oscillations are found to be different between the non-heated and heated parts from a single crystal, while no evidence of structural change in X-ray photograph was observed. The present result clearly shows that nominal valence or band filling can be controlled by simple thermal treatment for the quasi-two-dimensional organic metal. The mechanism of the change in the band filling is discussed in terms of anion decomposition.
- 一般社団法人日本物理学会の論文
- 2005-01-15
著者
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Yoshino Harukazu
Department Of Material Science Faculty Of Science Osaka City University
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Graf David
National High Magnetic Field Laboratory
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Brooks James
National High Magnetic Field Laboratory
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Nogami Yoshio
Graduate School Of Natural Science & Technology Okayama University
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Papavassiliou George
National Hellenic Research Foundation Theoretical And Physical Chemistry Institute
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Choi Eun
National High Magnetic Field Laboratory
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Li Lin
Department Of Computer Science And Technology & Wuhan University Of Technology
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Murata Keizo
Department Of Material Science Faculty Of Science Osaka City University
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Nakanishi Tsutomu
Department of Materials Science and Engineering, Waseda University, Tokyo 169-8555, Japan
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