Nuclea Relaxation Study in Strong Coupling Superconductors : A Comparison with High-T_c Superconductors
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概要
- 論文の詳細を見る
The nuclear relaxation beluavior in .s'- wave superconductors has been investigated asfor Claevrel-phase superconductors, T1Mo.Se,., and Sn...Mo.Se7.5 with T.=12.2Kand 4.2K, respectively. The nuclear-spin-lattice-rel;?xation rate, 1/T., of "'Sn iuaSn..,Mo.Se,., reveals a distinct col?erence peak just below T., followed by an exponential decrease with the isotropic euaergy gap of 2A=3.6 k.T. in a weak cougclincgregime. By contrast, l /T. of "'Tl in TlMo.Se,., possesses no colterence )ceak,although the exponential decrease of 1 / T. has also U>een observed with a somewhatlarger value of 2A=4.5 k.T. iua a stt"oztg coupling regime. Tlae stronger electronphonon coupling enlaances the superconducting tratasition temperature and at thesame time, opens a d<:cay c1?annel to cause an intense damping of quasiparticles,resulting in the depre:;sion of the coherence peak. Tlte coxaaparison with higla-7'. superconductors will be discussed.
- 社団法人日本物理学会の論文
- 1992-09-15
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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KYOGAKU Masafumi
Department of Material Physics,Faculty of Engineering Science,Osaka University
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Ohtani T
National Inst. Advanced Indudtrial Sci. And Technol. Ibaraki
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Ohtani Tsukio
Department Of Chemistry Faculty Of Science Kyoto University:okayama University Of Science Laboratory
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Ohtani T
Laboratory For Solid State Chemistry Okayama University Of Science
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Ohtani Tsukio
Laboratory For Solid State Chemistry Okayama University Of Science
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Ohtani Tsukio
Laboratory For Solid State Chemistry Okayama University
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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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Ohsugi Shigeki
Department of Material Physics, Faculty of Engineering Science, Osaka University
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Ohsugi S
Sci. Univ. Tokyo Chiba
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Ohsugi Shigeki
Department Of Material Physics Faculty Of Engineering Science Osaka University
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Kyogaku Masafumi
Department Of Material Physics Faculty Of Engineering Science Osaka University
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Ishida Kenji
Department Of Chemical Science And Engineering Graduate School Of Engineering Kobe University
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Ohsugi Shigeki
Department Of Cardiology Nagoya University Graduate School Of Medicine Nagoya University
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Ohsugi Shigeki
Department Of Cardiology Nagoya University Graduate School Of Medicine
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Ishida Kenji
Department of Applied Chemistry, Ibaraki University
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