Thermally induced charge current through long molecules

摘要

In this work we theoretically study steady state thermoelectric transportthrough a single-molecule junction with a long chain-like bridge. Electrontransmission through the system is computed using a tight-binding model for thebridge . We analyze dependences of thermocurrent on the bridge length inunbiased and biased systems operating within and beyond linear response regime.It is shown that length-dependent thermocurrent is controlled by the lineshapeof electron transmission in the interval corresponding to HOMO/LUMO transportchannel. Also, it is demonstrated that electron interactions with molecularvibrations may significantly affect length-dependent thermocurrent.