Session T41: Focus Session: Search for New Superconductors - Nanotubes and Fullerides
2:30 PM–5:18 PM, Wednesday, March 17, 2010
Room: F152
Sponsoring Unit:
DMP
Chair: Anvar Zakhidov, University of Texas at Dallas
Abstract ID: BAPS.2010.MAR.T41.6
Abstract: T41.00006 : Electron-phonon coupling in A15 Cs$_3$C$_{60}$ and fcc alkali fullerides
3:54 PM–4:06 PM
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Abstract 
Authors:
Takashi Koretsune
(Tokyo Institute of Technology)
Susumu Saito
We study the electron-phonon couplings of alkali-doped fullerides, fcc A$_3$C$_{60}$ (A=K,Rb) and A15 Cs$_3$C$_{60}$, using first-principles method based on the density functional theory. To improve the previous studies, we perform accurate calculations of phonon dispersion and electron-phonon coupling including momentum dependence and lattice symmetry. Furthermore, to estimate the superconducting transition temperature, we use Eliashberg equation instead of McMillan's formula. It is found that Eliashberg equation gives a quantitative improvement and that the obtained transition temperatures are reasonable compared to the experiments.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2010.MAR.T41.6