Thermal Transport Properties of Bechgaard Salts (TMTSF)<SUB>2</SUB>PF<SUB>6</SUB> and (TMTSF)<SUB>2</SUB>ClO<SUB>4</SUB>: Implication of Spin–Charge Separation

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  • Chai Yisheng
    Physics Department, University of Science and Technology of China
  • Yang Hongshun
    Physics Department, University of Science and Technology of China
  • Liu Jian
    Physics Department, University of Science and Technology of China
  • Sun Chenghai
    Physics Department, University of Science and Technology of China
  • Gao Huixian
    Physics Department, University of Science and Technology of China
  • Chen Xudong
    Physics Department, University of Science and Technology of China
  • Cao Liezhao
    Physics Department, University of Science and Technology of China
  • Lasjaunias Jean-Claude
    Centre de Recherches sur les Tres Basses Temperatures, Laboratoire Associe a l’Universite Joseph Fourier, CNRS

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  • Thermal transport properties of Bechgaard salts (TMTSF)2PF6 and (TMTSF)2ClO4: implication of spin-charge separation

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We report thermal transport measurements performed on the quasi-one-dimensional Bechgaard salts (TMTSF)2ClO4 and (TMTSF)2PF6 along the a-direction. For both salts, magnon-drag effects are found to contribute considerably to thermopower above 80 K. These results imply spin–charge separation in the metallic state for both salts. Moreover, a linear temperature-dependent thermal conductivity is found to be unaffected by anion disorder below an anion ordering transition temperature TAO∼25 K in (TMTSF)2ClO4.

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