NMR investigation on C60 superconductors, CsxRb3-xC60(x=1,2)

Y. Maniwa, K. Mizoguchi, K. Kume, K. Kikuchi, I. Ikemoto, S. Suzuki, Y. Achiba, K. Tanigaki, T. W. Ebbesen, S. Saito, J. Mizuki, J. S. Tsai, Y. Kubo

研究成果: Article

4 被引用数 (Scopus)

抄録

133Cs-NMR was observed in C60 superconductors, CsxRb3-xC60 with x=1 and 2. It was found that Cs atoms are intercalated in octahedral interstitial sites of C60 fcc lattice for x=1, while for x=2 in both of the octahedral and tetrahedral interstitial sites. The shift of the 133Cs-NMR strongly suggested that the 6s electron of Cs atom is fully ionized and conduction electrons are mainly on the C60 sites. 13C-NMR was observed to study electronic states at C60 sites. It showed a monotonic increase of the superconducting transition temperature, Tc, with increasing Fermi level density of states, N(Ef), at carbon sites, where N(Ef)-2 was assumed to be proportional to 13C spin-lattice relaxation time T1 times temperature T : N(Ef)-2∝ T1T.

本文言語English
ページ(範囲)3063-3067
ページ数5
ジャーナルSynthetic Metals
56
2-3
DOI
出版ステータスPublished - 1993 4 5
外部発表はい

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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