Electronic States of Low-Dimensional Organic Conductors(DMeDCNQI)2Cu and .ALPHA.-(BEDT-TTF)2KHg(SCN)4 under Pressure.

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  • Kagoshima S.
    Department of Basic Science, Graduate School of Arts and Sciences, University of Tokyo
  • Saito Y.
    Department of Basic Science, Graduate School of Arts and Sciences, University of Tokyo
  • Hanasaki N.
    Department of Basic Science, Graduate School of Arts and Sciences, University of Tokyo
  • Hasegawa T.
    Department of Basic Science, Graduate School of Arts and Sciences, University of Tokyo
  • Osada T.
    Research Center for Advanced Science and Technology, University of Tokyo
  • Sawa H.
    Department of Physics, Chiba University
  • Kato R.
    Institute for Solid State Physics, University of Tokyo
  • Miura N.
    Institute for Solid State Physics, University of Tokyo
  • Saito G.
    Department of Chemistry, Kyoto University, Kitashirakawa-Oiwake-cho

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  • Electronic States of Low-Dimensional Organic Conductors(DMeDCNQI)2Cu and α-(BEDT-TTF)2KHg(SCN)4 under Pressure
  • Electronic States of Low-Dimensional Or

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Abstract

Angle-dependent magnetoresistance measurements clarified the origin of the anomalous state of the organic quasi two-dimensional conductor (BEDT-TTF) 2KHg (SCN) 4 to be the Peierls instability on the one-dimensional part of the Fermi surface. Pressures higher than about 0. 5 GPa were found to increase the interlayer band-width to suppress the Peierls instability. With the help of the “chemical pressure effect” precise studies of (DMeDCNQI) 2Cu were made as functions of pressure to reveal the nature of the re-entered metallic state. Magnetoresistance and heat capacity measurements clarified the re-entered metallic state to be nothing but a normal metallic one.

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