Long distance coherent tunneling effect on the charge and heat currents in serially coupled triple quantum dots
arXiv:1309.1522 · doi:10.1103/PhysRevB.89.115416
Abstract
The effect of long distance coherent tunneling (LDCT) on the charge and heat currents in serially coupled triple quantum dots (TQDs) connected to electrodes is illustrated by using a combination of the extended Hurbbard model and Anderson model. The charge and heat currents are calculated with a closed-form Landauer expression for the transmission coefficient suitable for the Coulomb blockade regime. The physical parameters including bias-dependent quantum dot energy levels, electron Coulomb interactions, and electron hopping strengths are calculated in the framework of effective mass theory for semiconductor TQDs. We demonstrate that the effect of LDCT on the charge and heat currents can be robust. In addition, it is shown that prominent heat rectification behavior can exist in the TQD system with asymmetrical energy levels.
15 pages, 5 figures
References in corpus (11)
- Optimal thermoelectric figure of merit of a molecular junction
- Long-range coherent coupling in a quantum dot array
- Single mode heat rectifier: Controlling energy flow between electronic conductors
- Scattering theory of nonlinear thermoelectric transport
- Bipolar spin blockade and coherent state superpositions in a triple quantum dot
- Nonlinear heat transport in mesoscopic conductors: Rectification, Peltier effect and Wiedemann-Franz law
- Thermoelectric performance of a driven double quantum dot
- Thermodynamic and quantum bounds on nonlinear DC thermoelectric transport
- Seebeck coefficient of thermoelectric moleculat junction: First-principles calculations
- Nonthermal broadening in the conductance of double quantum dot structures
- Heat rectification effect of serially coupled quantum dots