d-Wave Superconductivity in Antiferromagnetic Heavy-Fermion Compound UPd_2Al_3 : Evidence from ^27Al NMR/NQR Studies
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概要
- 論文の詳細を見る
The nuclear-spin-lattice relaxation rate, ^27(1/ T_1), of the high-quality polycrystal-line Pd_2Al_3 with a record T_c=2K and the narrowest Al NQR linewidth to date of 12 kHz has been measured in zero magnetic field by the NQR technique. ^27(1/ T_1) below T_c has been found to obey the T^3-law at least down to 0. 18 K, giving strong evidence that the energy gap vanishes along lines on the Fermi surface. From the analysis of ^27Al Knight shift below T_c, it is shown that the anisotropic residual Knight shift originates from the f-electron susceptibility in the antiferromagnetic state, whereas the isotropic reduction of the shift below T_c is due to a singlet pairing nature of the superconductivity. Both the results of ^27(1/ T_1) and ^27Al Knight shift in UPd_2Al_3 can be reproduced consistently by a d-wave pairing model characterized by lines of vanishing gap on the Fermi surface.
- 社団法人日本物理学会の論文
- 1995-03-15
著者
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TOU Hideki
Department of Quantum Matter, AdSM, Hiroshima University
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KITAOKA Yoshio
Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka Universit
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Geibel Christoph
Max-planck Institute For Chemical Physics Of Solids
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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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Geibel C
Max‐planck Inst. Chemical Physics Of Solids Dresden Deu
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Steglich F
Max-planck Institute For Chemical Physics Of Solids
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Tou Hideki
Kobe Univ. Kobe Jpn
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Tou H
Osaka Univ. Toyonaka
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Tou Hideki
Department Of Physics Tokyo Metropolitan University
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Tou Hideki
Department Of Material Physics Faculty Of Engineering Science Osaka University
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Karaki Y
Department Of Material Physics Faculty 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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Geibel Christoph
Institute fur Festkorperphysik, Technishe Hochschule, Darmstadt
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Schank Christina
Institute fur Festkorperphysik, Technishe Hochschule, Darmstadt
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Steglich Frank
Institute fur Festkorperphysik, Technishe Hochschule, Darmstadt
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Steglich Frank
Institut Fur Festkorperphysik Technische Hochschule
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Schank Christina
Institute Fur Festkorperphysik Technishe Hochschule Darmstadt
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Tokumoto H
Department Of Quantum Matter Adsm Hiroshima University
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Asayama Kunisuke
Department of Material Physics, Faculty of Engineering Science, Osaka University:Presently Professor Emeritus of Osaka University
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