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Resistive superconducting transition of κ-type BEDT-TTF organic superconductors in a magnetic field |
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| Authors: | Hiroshi Ito Takehiko Ishiguro Tokutaro Komatsu Nozomu Matsukawa Gunzi Saito Hiroyuki Anzai |
| Affiliation: | 1. Department of Physics, Kyoto University, 606-01, Kyoto, Japan 2. Department of Chemistry, Kyoto University, 606-01, Kyoto, Japan 3. Department of Material Science, Himeji Institute of Technology, Kamigori, 678-12, Hyogo, Japan |
| Abstract: | The superconducting transition of the organic compoundsκ-(BEDT-TTF)2 X is studied by resistive measurement in a magnetic field up to 10 T applied normal to the conducting plane. For the salts withX=CuN(CN)2]Br andX=CuCNN(CN)2] the transition shows fanshaped broadening caused by superconductivity fluctuation. For theX=Cu(NCS)2 salt the resistivity shows a peak in the transition region in a magnetic field below 4 T.This phenomenon is suppressed in defect-reduced samples for intralayer conduction. We discuss this peak in relation to the thermal fluctuation on the Josephson junction structures in this salt. |
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