Increasing thermoelectric performance using coherent transport

Details Increasing thermoelectric performance using coherent transport Increasing thermoelectric performance using coherent transport

2011-07-04

arxiv.org/abs/1107.0572v2

Physical Review B 84, 113415 (2011)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4+ pages, 4 figures

Scientific paper

10.1103/PhysRevB.84.113415

We show that coherent electron transport through zero-dimensional systems can be used to tailor the shape of the system's transmission function. This quantum-engineering approach can be used to enhance the performance of quantum dots or molecules in thermal-to-electric power conversion. Specifically, we show that electron interference in a two-level system can substantially improve the maximum thermoelectric power and the efficiency at maximum power by suppressing parasitic charge flow near the Fermi energy, and by reducing electronic heat conduction. We discuss possible realizations of this approach in molecular junctions or quantum dots.

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