Thermoelectric properties of molecular junctions

I present general expressions for the low-temperature thermoelectric coefficients of atomic junctions. These results are used to analyze general trends in the thermoelectric properties of atomic and molecular junctions. In particular, I study the Seebeck coefficient and figure of merit of a series of molecular wires made of porphyrin units with different metallic atoms in the core. I show how these coefficients depend upon the specific electronic structure of the metallic atom and its coupling to the molecular wire.