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Raman Scattering Investigation of Superconductivity in Si46 Clathrates

  • S. L. Fang (a1), L. Grigorian (a1), A. M. Rao (a1), P. C. Eklund (a1), G. Dresselhaus (a2), M. S. Dresselhaus (a2), H. Kawaji (a3) and S. Yamanaka (a3)...

Abstract

Room temperature Raman scattering spectra are reported for the type II superconductors MxBaySi46 (M-Na, K) which were recently shown to exhibit Tc's ∼ 3.5 K. The spectra are compared to those of other Si46-clathrates which exhibit normal metallic behavior down to 2K. Thirteen of the twenty first-order Raman frequencies predicted by group theory have been detected, and the frequencies are found to be sensitive to the particular dopants. The Raman linewidths observed for the MxBaySi46 system are comparable to those observed for Na8Si46 and K7Si46. The data, taken collectively, suggest that the line broadening in the metallic Si-clathrates is due to important contributions from both the electron-phonon interaction as well as to a random filling of the Si cages.

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1. Kawaji, H., Horie, H., Yaraanaka, S. and Ishikawa, M., Phys. Rev. Lett. 74, p. 1,427 (1995).
2. Yamanaka, S., Horie, H.O., Kawaji, H. and Ishikawa, M., Eur. J. Solid State Inorg. Chem. t. 32, p. 799 (1995).
3. Saito, S. and Oshiyama, S., Phys. Rev. B 51, p. 2,628 (1995).
4. Kasper, J.S., Hagenmüller, P., Pouchard, M. and Cros, C., Science 150, p. 1,713 (1965).
5. Cros, C., Pouchard, M. and Hagenmüller, P.J., Solid State Chem. 2, p. 570 (1970).
6. Yamanaka, S., Horie, H.O., Nakano, H. and Ishikawa, M., Fullerene Science & Technology 3, p. 21 (1995).
7. Nakano, H. and Yamanaka, S., J. Solid State Chem. 108, p. 260 (1994).
8. Fang, S.L., Grigorian, L., Eklund, P.C., Paper in preparation.
9. Alben, R., Weaire, D., Smith, J.E. Jr., and Brodsky, M.H., Phys. Rev. B 11, p. 2,271 (1975).

Raman Scattering Investigation of Superconductivity in Si46 Clathrates

  • S. L. Fang (a1), L. Grigorian (a1), A. M. Rao (a1), P. C. Eklund (a1), G. Dresselhaus (a2), M. S. Dresselhaus (a2), H. Kawaji (a3) and S. Yamanaka (a3)...

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