Heat rectification effect of serially coupled quantum dots

Abstract

The nonlinear thermoelectric properties of serially coupled quantum dots (SCQDs) embedded in a nanowire connected to metallic electrodes are theoretically studied in the Coulomb blockade regime. We demonstrate that the electron heat current of SCQDs exhibit a direction-dependent behavior (heat rectification) in an asymmetrical structure in which the electron Coulomb interactions are significant. The phonon thermal conductivity of the nanowire is also calculated, which is used to estimate the phonon heat current. Finally, we discuss how to reduce phonon heat current to allow observation of electron heat rectification behavior in the SCQD junction system in low temperature regime ($\approx 3K$).

arXiv comment9 pages and 6 figures

References in corpus (12)

• Spins in few-electron quantum dots
• Thermal diode: Rectification of heat flux
• Asymmetric Properties of Heat Conduction in a One-Dimensional Frenkel-Kontorova Model
• Quantum dot as thermal rectifier
• Optimal thermoelectric figure of merit of a molecular junction
• Thermoelectric and thermal rectification properties of quantum dot junctions
• Enhancement of the thermoelectric figure of merit in a quantum dot due to the Coulomb blockade effect
• Bipolar spin blockade and coherent state superpositions in a triple quantum dot
• Tunneling current spectroscopy of a nanostructure junction involving multiple energy levels
• Theory of spin blockade, charge ratchet effect, and thermoelectrical behavior in serially coupled quantum-dot system
• Photon- and phonon-assisted tunneling in the three-dimensional charge stability diagram of a triple quantum dot array
• Effects of interdot hopping and Coulomb blockade on the thermoelectric properties of serially coupled quantum dots

Cited by in corpus (5)

• Thermoelectrics with Coulomb coupled quantum dots
• Thermal Gating of Charge Currents with Coulomb Coupled Quantum Dots
• Long distance coherent tunneling effect on the charge and heat currents in serially coupled triple quantum dots
• Superlattice nanowire heat engines with direction-dependent power output and heat current
• Heat rectification by two qubits coupled with Dzyaloshinskii-Moriya interaction