The matrix elements of the deformation potential of C-70 are calculated by means of a simple, yet accurate solution of the electron-phonon coupling problem in fullerenes, based on a parametrization of the ground-state electronic density of the system in terms of sp(2+x) hybridized orbitals. The value of the calculated dimensionless total electron-phonon coupling constant is lambda approximate to 0.1, an order of magnitude smaller than in C-60, consistent with the lack of a superconducting phase transition in C(70)A(3) fullerite, and in overall agreement with measurements of the broadening of Raman peaks in C70K4 We also calculate the photoemission cross section of C-70(-) which is found to display less structure than that associated with C-60(-), in overall agreement with the experimental findings.

Electron-phonon interaction in C-70 / D. Provasi, N. Breda, R. Broglia, G. Colo, H. Roman, G. Onida. - In: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS. - ISSN 1098-0121. - 61:11(2000), pp. 7775-7780.

Electron-phonon interaction in C-70

G. Colo;G. Onida
Ultimo
2000

Abstract

The matrix elements of the deformation potential of C-70 are calculated by means of a simple, yet accurate solution of the electron-phonon coupling problem in fullerenes, based on a parametrization of the ground-state electronic density of the system in terms of sp(2+x) hybridized orbitals. The value of the calculated dimensionless total electron-phonon coupling constant is lambda approximate to 0.1, an order of magnitude smaller than in C-60, consistent with the lack of a superconducting phase transition in C(70)A(3) fullerite, and in overall agreement with measurements of the broadening of Raman peaks in C70K4 We also calculate the photoemission cross section of C-70(-) which is found to display less structure than that associated with C-60(-), in overall agreement with the experimental findings.
Settore FIS/03 - Fisica della Materia
Article (author)
File in questo prodotto:
Non ci sono file associati a questo prodotto.
Pubblicazioni consigliate

Caricamento pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2434/192166
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 4
  • ???jsp.display-item.citation.isi??? 4
social impact