  Thermoelectric properties of a C60 molecular transistor are studied using
Green function formalism in linear response regime. A tight-binding model is
used to investigate the effect of the dimerization and coupling geometry on the
electrical conductance, thermopower, and figure of merit. Increase of the
connection points between the molecule and electrodes results in decrease of
the number of the peaks of the electrical conductance owing to the interference
effects. In addition, oscillation of the thermopower is reduced by increase of
the connection points. It is also observed that the kind of carriers
participating in the energy transport is dependent on the coupling geometry.
Results show that the increase of the connection points leads to the reduction
of the figure of merit.
