Thermoelectric transport properties of a T-shaped double quantum dot system in the Coulomb blockade regime

Abstract

We investigate the thermoelectric properties of a T-shaped double quantum dot system described by a generalized Anderson Hamiltonian. The system's electrical conduction (G) and the fundamental thermoelectric parameters such as the Seebeck coefficient ($S$) and the thermal conductivity ($\kappa$), along with the system's thermoelectric figure of merit (ZT) are numerically estimated based on a Green's function formalism that includes contributions up to the Hartree-Fock level. Our results account for finite onsite Coulomb interaction terms in both component quantum dots and discuss various ways leading to an enhanced thermoelectric figure of merit for the system. We demonstrate that the presence of Fano resonances in the Coulomb blockade regime is responsible for a strong violation of the Wiedemann-Franz law and a considerable enhancement of the system's figure of merit ($ZT$).

arXiv comment7 pages, 10 figures

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Cited by in corpus (10)

• The effect of Coulomb interactions on nonlinear thermovoltage and thermocurrent in quantum dots
• Cavity-photon controlled thermoelectric transport through a quantum wire
• Enhancement of the thermoelectric efficiency in a T-shaped quantum dot system in the linear and nonlinear regimes
• Thermoelectric transport properties in graphene connected molecular junctions
• Length-dependent thermopower of single-molecule junctions
• Thermally induced charge current through long molecules
• Length-dependent Seebeck effect in single-molecule junctions beyond linear response regime
• The Effects of Environment on Thermopower and Thermocurrent in Open Molecular Junctions
• Thermoelectric efficiency of single-molecule junctions with long molecular linkers
• Fano effect in a thermally induced transport through a triple quantum dot within the Coulomb blockade regime