Neutron spectroscopy and electron-phonon coupling in alkali-metal-doped fullerides

K. Prassides; C. Christides; M. J. Rosseinsky; J. Tomkinson; D. W. Murphy; R. C. Haddon

doi:10.1209/0295-5075/19/7/011

Neutron spectroscopy and electron-phonon coupling in alkali-metal-doped fullerides

K. Prassides, C. Christides, M. J. Rosseinsky, J. Tomkinson, D. W. Murphy, R. C. Haddon

Advanced Institute for Materials Research (AIMR)

Research output: Contribution to journal › Letter › peer-review

48 Citations (Scopus)

Abstract

The vibrational spectrum of saturation-doped insulating Rb₆C₆₀has been measured by inelastic neutron scattering at nonzero momentum transfer in the energy range (5 ¸ 200) meV at 20 K. The two lowest-energy fivefold degenerate H_gmodes sharpen substantially in comparison with superconducting K₃C₆₀, acquiring comparable widths to those found in pristine C₆₀. This is interpreted as evidence for the importance of these modes in the pairing interaction for superconductivity. We estimate that the radial H_gmodes make a substantial contribution to the total electron-phonon coupling strength in the superconducting fullerides.

Original language	English
Pages (from-to)	629-635
Number of pages	7
Journal	EPL
Volume	19
Issue number	7
DOIs	https://doi.org/10.1209/0295-5075/19/7/011
Publication status	Published - 1992 Aug 1

ASJC Scopus subject areas

Physics and Astronomy(all)

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title = "Neutron spectroscopy and electron-phonon coupling in alkali-metal-doped fullerides",

abstract = "The vibrational spectrum of saturation-doped insulating Rb6C60has been measured by inelastic neutron scattering at nonzero momentum transfer in the energy range (5 ¸ 200) meV at 20 K. The two lowest-energy fivefold degenerate Hgmodes sharpen substantially in comparison with superconducting K3C60, acquiring comparable widths to those found in pristine C60. This is interpreted as evidence for the importance of these modes in the pairing interaction for superconductivity. We estimate that the radial Hgmodes make a substantial contribution to the total electron-phonon coupling strength in the superconducting fullerides.",

author = "K. Prassides and C. Christides and Rosseinsky, {M. J.} and J. Tomkinson and Murphy, {D. W.} and Haddon, {R. C.}",

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T1 - Neutron spectroscopy and electron-phonon coupling in alkali-metal-doped fullerides

AU - Prassides, K.

AU - Christides, C.

AU - Rosseinsky, M. J.

AU - Tomkinson, J.

AU - Murphy, D. W.

AU - Haddon, R. C.

PY - 1992/8/1

Y1 - 1992/8/1

N2 - The vibrational spectrum of saturation-doped insulating Rb6C60has been measured by inelastic neutron scattering at nonzero momentum transfer in the energy range (5 ¸ 200) meV at 20 K. The two lowest-energy fivefold degenerate Hgmodes sharpen substantially in comparison with superconducting K3C60, acquiring comparable widths to those found in pristine C60. This is interpreted as evidence for the importance of these modes in the pairing interaction for superconductivity. We estimate that the radial Hgmodes make a substantial contribution to the total electron-phonon coupling strength in the superconducting fullerides.

AB - The vibrational spectrum of saturation-doped insulating Rb6C60has been measured by inelastic neutron scattering at nonzero momentum transfer in the energy range (5 ¸ 200) meV at 20 K. The two lowest-energy fivefold degenerate Hgmodes sharpen substantially in comparison with superconducting K3C60, acquiring comparable widths to those found in pristine C60. This is interpreted as evidence for the importance of these modes in the pairing interaction for superconductivity. We estimate that the radial Hgmodes make a substantial contribution to the total electron-phonon coupling strength in the superconducting fullerides.

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