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 language | English |
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Pages (from-to) | 5366-5369 |
Number of pages | 4 |
Journal | Physical Review B - Condensed Matter and Materials Physics |
Volume | 62 |
Issue number | 9 |
DOIs | |
Publication status | Published - Sep 1 2000 |
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics