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

doi:10.1016/0379-6779(93)90080-G

NMR investigation on C₆₀ superconductors, Cs_xRb_3-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

Research output: Contribution to journal › Article

4 Citations (Scopus)

Abstract

¹³³Cs-NMR was observed in C₆₀ superconductors, Cs_xRb_3-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(E_f), at carbon sites, where N(E_f)^-2 was assumed to be proportional to ¹³C spin-lattice relaxation time T₁ times temperature T : N(E_f)^-2∝ T₁T.

Original language	English
Pages (from-to)	3063-3067
Number of pages	5
Journal	Synthetic Metals
Volume	56
Issue number	2-3
DOIs	https://doi.org/10.1016/0379-6779(93)90080-G
Publication status	Published - 1993 Apr 5
Externally published	Yes

Keywords

C
Cs-NMR
NMR
superconductor

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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Maniwa, Y., Mizoguchi, K., Kume, K., Kikuchi, K., Ikemoto, I., Suzuki, S., Achiba, Y., Tanigaki, K., Ebbesen, T. W., Saito, S., Mizuki, J., Tsai, J. S., & Kubo, Y. (1993). NMR investigation on C₆₀ superconductors, Cs_xRb_3-xC₆₀(x=1,2). Synthetic Metals, 56(2-3), 3063-3067. https://doi.org/10.1016/0379-6779(93)90080-G

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

abstract = "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.",

keywords = "C, Cs-NMR, NMR, superconductor",

author = "Y. Maniwa and K. Mizoguchi and K. Kume and K. Kikuchi and I. Ikemoto and S. Suzuki and Y. Achiba and K. Tanigaki and Ebbesen, {T. W.} and S. Saito and J. Mizuki and Tsai, {J. S.} and Y. Kubo",

year = "1993",

month = apr,

day = "5",

doi = "10.1016/0379-6779(93)90080-G",

language = "English",

volume = "56",

pages = "3063--3067",

journal = "Synthetic Metals",

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TY - JOUR

T1 - NMR investigation on C60 superconductors, CsxRb3-xC60(x=1,2)

AU - Maniwa, Y.

AU - Mizoguchi, K.

AU - Kume, K.

AU - Kikuchi, K.

AU - Ikemoto, I.

AU - Suzuki, S.

AU - Achiba, Y.

AU - Tanigaki, K.

AU - Ebbesen, T. W.

AU - Saito, S.

AU - Mizuki, J.

AU - Tsai, J. S.

AU - Kubo, Y.

PY - 1993/4/5

Y1 - 1993/4/5

N2 - 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.

AB - 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.

KW - C

KW - Cs-NMR

KW - NMR

KW - superconductor

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