Advanced Topics on Condensed Matter Physics
Department of Physics, NCU
Thermoelectric properties of a quantum dot molecule connected to metallic electrodes
Speaker
Professor M. T. Kuo
Nanodevices Laboratory, Department of Electrical Engineering
National Central University
Date 2016/11/10 (Thur)
Time: 14.00
Place: S4-625
We theoretically study the thermoelectric (TE) properties of quantum dot molecules (QDMs) in the linear and nonlinear response regime. The considered system Hamiltonian is simulated by the extended Anderson model. The Keldysh-Green function technique is used to calculate the carrier transport of QDMs junction system in the Coulomb blockade condition. The effects arising from electron hopping strengths and electron Coulomb interactions on the TE efficiency of QDM system are revealed. In addition, how the quantum interference effect to influence the power factor is discussed. We found that the figure of merit for thermoelectric effect of QDM can be significantly enhanced when the degree of degeneracy for the energy levels involved in electron transport is increased. In the nonlinear response regime, we illustrate the direction-dependent heat current of QDMs for the next generation TE applications.