Superconductivity in Boron-doped SiC(Condensed matter : electronic structure and electrical, magnetic, and optical properties)
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概要
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We report superconductivity in heavily boron-doped bulk silicon carbide related to the diamond structure. The compound exhibits zero resistivity and diamagnetic susceptibility below a critical temperature T_c of 〜1.4K, and an effective boron doping concentration higher than 10^<21>cm^<-3>. We present the H-T phase diagram of this new superconducting compound determined from AC susceptibility. In finite DC magnetic fields a clear hysteresis was observed between cooling and subsequent warming runs. This indicates, in contrast with the type-II superconductivity in boron-doped diamond and silicon, that a type-I superconductivity with a critical field H_c(0) of about 100 Oe is realized in boron-doped SiC. Moreover, the specific-heat shows a clear jump at T_c, demonstrating bulk nature of the superconductivity.
- 社団法人日本物理学会の論文
- 2007-10-15
著者
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AKIMITSU Jun
Department of Physics, Aoyama Gakuin University
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Kriener Markus
Department Of Physics Graduate School Of Science Kyoto University
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MAENO Yoshiteru
Department of Physics, Graduate School of Science, Kyoto University
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REN Zhi-An
Department of Physics and Mathematics, Aoyama Gakuin University
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KATO Junya
Department of Physics and Mathematics, Aoyama Gakuin University
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MURANAKA Takahiro
Department of Physics and Mathematics, Aoyama Gakuin University
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Maeno Yoshiteru
Department Of Physics Graduate School Of Science Kyoto University
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Muranaka Takahiro
Department Of Physics And Mathematics Aoyama Gakuin University
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Akimitsu Jun
Department Of Physics And Mathematics Aoyama Gakuin University
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Akimitsu Jun
Faculty Of Science And Engineering Aoyama-gakuin University
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Maeno Yoshiteru
Department Of Physics Graduate School Of Science Kyoto University:international Innovation Center Ky
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Maeno Yoshiteru
Department Of Physics Faculty Of Science Hiroshima University
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Ren Zhi-an
Department Of Physics And Mathematics Aoyama Gakuin University
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Kato Junya
Department Of Physics And Mathematics Aoyama Gakuin University
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