Cu NMR and NQR Studies of Impurities-Doped YBa_2(Cu_<1-x>M_x)_3O_7 (M=Zn and Ni)
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概要
- 論文の詳細を見る
The normal and superconducting properties in impurity-doped YBa_2(Cu_<1-x>M_x)_3O_7 (M=Zn and Ni) have been investigated by ^63Cu NMR and NQR techniques. The nonmagnetic Zn-doping into the CuO_2 plane in YBa_2Cu_3O_7(YBCO_7) causes a local collapse of antiferromagnetic (AF) spin correlation near Zn impurities and induces a gapless superconductivity with a finite density of states at the Fermi surface. On the other hand, in the case of Ni doping, there is no appreciable modification except for a small decrease of T_c, although the Ni spins behave actually as local moments. The gapless feature in Zn-doped YBCO_7 is shown to be consistently interpreted within the framework of the d-wave model with gap zeros of lines at the Fermi surface as argued in heavy fermion superconductors. It is pointed out that the AF spin fluctuation-induced superconductivity is applicable to high-T_c cuprates.
- 社団法人日本物理学会の論文
- 1993-08-15
著者
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ISHIDA Kenji
Department of Physics, Graduate School of Science, Kyoto University
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KITAOKA Yoshio
Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka Universit
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Asayama Kunisuke
Department of Material Physics, Faculty of Engineering Science, Osaka University
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Asayama Kunisuke
Department Of Physical Science Graduate School Of Engineering Science Osaka University
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Asayama Kunisuke
Department Of Material Physics Faculty Of Engineering Science Osaka University
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Kohori Y
Chiba Univ. Chiba
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Karaki Y
Department Of Material Physics Faculty Of Engineering Science Osaka University
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Kitaoka Yoshio
Graduate School Of Engineering Science Osaka University
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Kitaoka Yoshio
Department Of Material Physics Faculty Of Engineering Science Osaka University
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Ishida Kenji
Department Of Orthopaedic Surgery Kochi Medical School
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Ogata N
Osaka Univ. Osaka Jpn
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Ogata Nobuhito
Department of Material Physics, Faculty of Engineering Science, Osaka University
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Kamino Takeshi
Department of Material Physics, Faculty of Engineering Science, Osaka University
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Cooper R.
IRC in Superconductivity, University of Cambridge
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Athanassopoulou N.
IRC in Superconductivity, University of Cambridge
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Athanassopoulou N.
Irc In Superconductivity University Of Cambridge
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Ishida Kenji
Department Of Chemical Science And Engineering Graduate School Of Engineering Kobe University
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Cooper R.
Irc In Superconductivity University Of Cambridge
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Kamino Takeshi
Department Of Material Physics Faculty Of Engineering Science Osaka University
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Ishida Kenji
Department of Applied Chemistry, Ibaraki University
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