Structure and Raman scattering of Cs3C60 under high pressure

S. Fujiki, Y. Kubozono, S. Emura, Y. Takabayashi, S. Kashino, A. Fujiwara, K. Ishii, H. Suematsu, Y. Murakami, Y. Iwasa, T. Mitani, H. Ogata

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Abstract

Raman scattering is studied for a pressure-induced superconductor Cs3C60 in a pressure region from 1 bar to 62 kbar. The center frequency ω0 for Hg(1) and Hg(2) Raman peaks increase by applying pressure, but the increase shows a saturation in the high-pressure region. On the other hand, the ω0 for Ag(1) and Ag(2) modes increase monotonically in all pressure regions. The electron-phonon coupling constant for Cs3C60 shows a rapid decrease up to 30 kbar and an increase above 30 kbar. This result may be associated with a transformation from a multiphase (body-centered orthorhombic and A 15 phases) to a single phase around 20 kbar. X-ray powder diffraction pattern at 11 K under a pressure of 40 kbar shows that a superconducting phase for Cs3C60 is body-centered orthorhombic.

Original languageEnglish
Pages (from-to)5366-5369
Number of pages4
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume62
Issue number9
DOIs
Publication statusPublished - Sep 1 2000

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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    Fujiki, S., Kubozono, Y., Emura, S., Takabayashi, Y., Kashino, S., Fujiwara, A., Ishii, K., Suematsu, H., Murakami, Y., Iwasa, Y., Mitani, T., & Ogata, H. (2000). Structure and Raman scattering of Cs3C60 under high pressure. Physical Review B - Condensed Matter and Materials Physics, 62(9), 5366-5369. https://doi.org/10.1103/PhysRevB.62.5366