| Issue |
Europhys. Lett.
Volume 59, Number 4, August 2002
|
|
|---|---|---|
| Page(s) | 572 - 578 | |
| Section | Condensed matter: electronic structure, electrical, magnetic, and opticalproperties | |
| DOI | https://doi.org/10.1209/epl/i2002-00384-1 | |
| Published online | 01 August 2002 | |
Electron-phonon interaction in the solid form
of the smallest fullerene 
Dipartimento di Scienza dei Materiali and Istituto
Nazionale di Fisica per la Materia Università di
Milano-Bicocca - Via Cozzi 53, I-20125, Milano, Italy
Received:
7
March
2002
Accepted:
21
May
2002
The electron-phonon coupling of a theoretically devised carbon
phase made by assembling the smallest fullerenes is
calculated from first principles. The structure consists of
cages in a fcc lattice interlinked by two bridging
carbon atoms in the interstitial tetrahedral sites
(fcc-
). The crystal is insulating but can be made
metallic by doping with interstitial alkali atoms. In the
compound 
the calculated coupling constant
is 0.28
, a value much larger than in
, as expected from the larger curvature of
. On the basis of McMillan's formula, the
calculated 
and a 
assumed in the range
0.3–0.1, a superconducting 
in the range 15–55
is
predicted.
PACS: 71.15.Mb – Density functional theory, local density approximation, gradient and other corrections / 74.70.Wz – Fullerenes and related materials / 74.10.+v – Superconductivity: Occurrence, potential candidates
© EDP Sciences, 2002
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