Superconductivity at 40K in Cesium Doped C60

Abstract

We report superconductivity in Cs3 C60 at 40K using ac susceptibility measurements under hydrostatic conditions up to 15 kbar. Cs3C60 was prepared by reaction of C60 with Cs in liquid ammonia, followed by heating at 150°C. This route circumvents formation of the energetically more stable Cs1C60 and Cs4C60 phases. We have studied the synthesis and phase formation by measuring the symmetric Ag pentagonal pinch mode of C60 using Raman spectroscopy. Whereas Raman spectroscopy indicates homogeneous charge transfer of three electrons, x-ray diffraction indicates two phases other than the commonly observed fee structure. This superconducting transition temperature is considerably higher than for known doped C60 compounds and intermetallic compounds.

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References

  1. 1.

    S.P. Kelty et al. Nature 352, 223–225 (1991).

    CAS  Article  Google Scholar 

  2. 2.

    K. Tanigaki et al. Nature 352, 222–225 (1991).

    CAS  Article  Google Scholar 

  3. 3.

    J.D. Thompson, Rev. Sci. Instrum. 55, 231–234 (1984).

    Article  Google Scholar 

  4. 4.

    D. Shoenberg, Proc.Roy.Soc. (London) A 175, 49 (1940).

    CAS  Google Scholar 

  5. 5.

    O. Zhou et al. Nature 351, 462–464 (1991).

    CAS  Article  Google Scholar 

  6. 6.

    D.L. Novikov et al. Physica C 191, 399–408 (1992).

    CAS  Article  Google Scholar 

  7. 7.

    M.-Z. Huang et al. Phys.Rev.B 46, 6572–6577 (1992).

    CAS  Article  Google Scholar 

  8. 8.

    K. Prassides et al. Science 263, 950–954 (1994).

    CAS  Article  Google Scholar 

Download references

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Correspondence to T. T. M. Palstra.

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Palstra, T.T.M., Zhou, O., Iwasa, Y. et al. Superconductivity at 40K in Cesium Doped C60. MRS Online Proceedings Library 359, 285–288 (1994). https://doi.org/10.1557/PROC-359-285

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