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High pressure study on the superconducting transition temperature and Hall coefficient of Ba1−xKxBiO3 up to 8 GPa |
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| Authors: | H. Takahashi, N. M ri, Y. Nagata, S. Nakamura, T. Uchida, J. Akimitsu,Y. Tokura |
| Affiliation: | a Institute for Solid State Physics, University of Tokyo, Roppongi, Minato-ku, Tokyo 106, Japan b College of Science and Engineering, Aoyama-Gakuin University, Chitosedai, Setagaya-ku, Tokyo 157, Japan c Department of Physics, University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113, Japan |
| Abstract: | The superconducting transition temperature (Tc) of Ba0.62K0.38Bio3 (Tc=30 K) has been measured under high pressure up to 8 GPa. It is observed that Tc increases initially with pressure, as reported by Uwe et al., Shirber et al. and Huang et al., but decreases above 4 GPa. The Hall coefficient of Ba0.62K0.38BiO3 has been measured up to 1.2 GPa. The absolute value of the Hall coefficient decreases with pressure by 10% GPa, the value of which is almost the same as that obtained in most CuO-based high-temperature superconductors. |
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