Real Space Imaging of the Metal-Insulator Phase Separation in the Band Width Controlled Organic Mott System k-(BEDT-TTF)_2Cu[N(CN)_2]Br(Condensed Matter : Electronic Structure, Electrical, Magnetic and Optical Properties)
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概要
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Systematic investigation of the electronic phase separation on macroscopic scale is reported in the organic Mott system k-(BEDT-TTF)_2Cu[N(CN)_2]Br. Real space imaging of the phase separation is obtained by means of scanning micro-region infrared spectroscopy using the synchrotron radiation. The phase separation appears near the Mott boundary and changes its metal-insulator fraction with the substitution ratio x in k-[(h-BEDT-TTF)_<1-x>(d-BEDT-TTF)_x]_2Cu[N(CN)_2]Br, of which band width is controlled by the substitution ratio x between the hydrogenated BEDT-TTF molecule (h-BEDT-TTF) and the deuterated one (d-BEDT-TTF). The phase separation phenomenon observed in this class of organics is considered on the basis of the strongly correlated electronic phase diagram with the first order Mott transition.
- 一般社団法人日本物理学会の論文
- 2005-08-15
著者
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Kobayashi N.
Institute for Materials Research, Tohoku University
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Sasaki T.
Institute for Materials Research, Tohoku University
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Suzuki A.
Institute for Nuclear Study, University of Tokyo
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Yoneyama N.
Institute for Materials Research, Tohoku University
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IKEMOTO Y.
Spring-8, Japan Synchrotron Radiation Research Institute
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KIMURA H.
Spring-8, Japan Synchrotron Radiation Research Institute
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