Charge profile of surface doped C60

Details Charge profile of surface doped C60 Charge profile of surface doped C60

2001-06-21

arxiv.org/abs/cond-mat/0106433v2

Eur. Phys. J. B 23, 345-350 (2001)

Physics

Condensed Matter

Superconductivity

6 pages, 9 figures

Scientific paper

10.1007/s100510170054

We study the charge profile of a C60-FET (field effect transistor) as used in the experiments of Schoen, Kloc and Batlogg. Using a tight-binding model, we calculate the charge profile treating the Coulomb interaction in a mean-field approximation. The charge profile behaves similarly to the case of a continuous space-charge layer, in particular it is confined to a single interface layer for doping higher than ~0.3 electron (or hole) per C60 molecule. The morahedral disorder of the C60 molecules smoothens the structure in the density of states.

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