Thermal Conductivity of (DMe-DCNQI)_2Li_<1-x>Cu_x(x=1 and 0.75) : Anomalous Temperature Hysteresis Depending on Cu Concentration(Condensed matter: structure and mechanical and thermal properties)

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概要

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• We have measured the thermal conductivity of organic molecular crystals (DMe-DCNQI)_2Li_<1-x>Cu_x(x=1 and 0.75) over a wide temperature range between 4 and 250K. The electronic contribution can be analyzed particularly below〜80K. A thermal hysteresis depending on the Cu concentration x has been observed between the heating and cooling processes. The system stays in a metallic state when the sample is cooled from room temperature, while a small fraction of insulating islands is created in the metallic state when heated up to room temperature. The insulating islands survive even at high temperatures. This mechanism gives rise to the hysteretic behavior. Heat conduction is sensitive to the difference in the two phases, in contrast with electrical resistivity.

• 社団法人日本物理学会の論文
• 2006-07-15

著者

• TORIZUKA Kiyoshi

  Institute for Solid State Physics,University of Tokyo

• TAJIMA Hiroyuki

  Institute for Solid State Physics, The University of Tokyo

• Torizuka Kiyoshi

  Institute For Solid State Physics University Of Tokyo

• Tajima Hiroyuki

  Institute For Solid State Physics The University Of Tokyo

• Tajima Hiroyuki

  Institute For Solid State Physics University Of Tokyo

• YAMAMOTO Takashi

  RIKEN (The Institute of Physical and Chemical Research)

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