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Systematic investigation of electronic structure in BEDT-TTF based organic superconductors withT c above 10 K; κ-(BEDT-TTF)2 X (X=Cu(NCS)2, Cu[N(CN)2]Br, and Cu(CN)[N(CN)2])

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Abstract

The electronic structure of the title superconductors has been investigated by electrical resistivity, complex susceptibility, and electron paramagnetic resonance (EPR) measurements. The superconducting properties (pressure dependence ofT c , magnetic penetration depth, upper critical field, and so on) of these three salts are similar to each other, while transport properties in the normal state have shown a large variety in the temperature dependence. In order to clarify the electronic structure in the normal state, the EPR parameters, the spin susceptibility (χ spin), and the linewidth (ΔH pp), are compared. An anomalous temperature dependence of theg-value has been observed below 150 K in the Cu(NCS)2 and Cu(CN)[N(CN)2] salts.

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Authors and Affiliations

  1. Department of Physics, Gakushuin University, Mejiro, 171, Tokyo, Japan

    Toshikazu Nakamura, Tomoko Nobutoki, Masao Miyamoto, Yuichi Tsubokura, Ryota Tsuchiya & Toshihiro Takahashi

  2. Institute for Molecular Science, Myodaiji, 444, Okazaki, Japan

    Kazushi Kanoda

  3. Department of Chemistry, Kyoto University, Sakyo-ku, 606, Kyoto, Japan

    Gunzi Saito

Authors
  1. Toshikazu Nakamura
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  2. Tomoko Nobutoki
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  3. Masao Miyamoto
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  4. Yuichi Tsubokura
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  5. Ryota Tsuchiya
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  6. Toshihiro Takahashi
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  7. Kazushi Kanoda
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  8. Gunzi Saito
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Nakamura, T., Nobutoki, T., Miyamoto, M. et al. Systematic investigation of electronic structure in BEDT-TTF based organic superconductors withT c above 10 K; κ-(BEDT-TTF)2 X (X=Cu(NCS)2, Cu[N(CN)2]Br, and Cu(CN)[N(CN)2]). J Supercond 7, 671–674 (1994). https://doi.org/10.1007/BF00728483

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  • DOI: https://doi.org/10.1007/BF00728483

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