Mechanism for large thermoelectric power in negative-U molecular quantum dots

Abstract

We investigate with the aid of numerical renormalization group techniques the thermoelectric properties of a molecular quantum dot described by the negative-U Anderson model. We show that the charge Kondo effect provides a mechanism for enhanced thermoelectric power via a correlation induced asymmetry in the spectral function close to the Fermi level. We show that this effect results in a dramatic enhancement of the Kondo induced peak in the thermopower of negative-U systems with Seebeck coefficients exceeding 50$\mu V/K$ over a wide range of gate voltages.

4 pages, 4 figures; published version

References in corpus (9)

• The numerical renormalization group method for quantum impurity systems
• Mechanical Control of Spin States in Spin-1 Molecules and the Underscreened Kondo Effect
• Sum-rule Conserving Spectral Functions from the Numerical Renormalization Group
• A Numerical Renormalization Group approach to Green's Functions for Quantum Impurity Models
• Thermopower of a Kondo-correlated quantum dot
• Thermoelectric transport through strongly correlated quantum dots
• Many Body Effects on the Transport Properties of Single-Molecule Devices
• A novel approach to transport through correlated quantum dots
• Nonequilibrium charge-Kondo transport through negative-U molecules

Cited by in corpus (44)

• Spin-thermopower in interacting quantum dots
• Thermopower enhancement by encapsulating cerium in clathrate cages
• Thermoelectric performance of a driven double quantum dot
• Double quantum dot as a minimal thermoelectric generator
• Efficiency and power of a thermoelectric quantum dot device
• Charge Kondo anomalies in PbTe doped with Tl impurities
• Padé approximants for improved finite-temperature spectral functions in the numerical renormalization group
• Heat, molecular vibrations, and adiabatic driving in non-equilibrium transport through interacting quantum dots
• Thermoelectric study of dissipative quantum dot heat engines
• Heat current across a capacitively coupled double quantum dot for high magnetic field
• Enhancing of nonlinear thermoelectric response of a correlated quantum dot in the Kondo regime by asymmetrically coupling to the leads
• Thermoelectric response of a correlated impurity in the nonequilibrium Kondo regime
• The interacting resonant level model in nonequilibrium: finite temperature effects
• Functional renormalization group study of the Anderson--Holstein model
• Fate of the spin-\frac{1}{2} Kondo effect in the presence of temperature gradients
• How to control Spin-Seebeck current in a metal-quantum dot-magnetic insulator junction
• Thermoelectric effects in molecular quantum dots with contacts
• Spin-current Seebeck effect in quantum dot systems
• Thermoelectrics of Interacting Nanosystems -- Exploiting Superselection instead of Time-Reversal Symmetry
• Anisotropic charge Kondo effect in a triple quantum dot
• Magnetic field dependence of the thermopower of Kondo-correlated quantum dots
• Tunable spin/charge Kondo effect at a double superconducting island connected to two spinless quantum wires
• Influence of phonon-assisted tunneling on the linear thermoelectric transport through molecular quantum dots
• Magnetic field dependence of the thermopower of Kondo-correlated quantum dots: Comparison with experiment
• Attractive and driven interaction in quantum dots: mechanisms for geometric pumping
• Geometric energy transport and refrigeration with driven quantum dots
• Spin thermopower in the overscreened Kondo model
• Quantum phase transitions in a pseudogap Anderson-Holstein model
• Interplay of the Kondo effect with the induced pairing in electronic and caloric properties of T-shaped double quantum dots
• Thermoelectric performance of strongly-correlated quantum impurity models
• Nonequilibrium Kondo effect by equilibrium numerical renormalization group method: The hybrid Anderson model subject to a finite spin bias
• Orbital caloritronic transport in strongly interacting quantum dots
• Giant spin Nernst effect induced by resonant scattering at surfaces of metallic films
• Charge-Kondo effect mediated by repulsive interactions
• Reversal of particle-hole scattering-rate asymmetry in Anderson impurity model
• Nonlinear thermoelectric transport in single-molecule junctions: the effect of electron-phonon interactions
• Strongly correlated electrons in superconducting islands with fluctuating Cooper pairs
• Charge Kondo Effect and Superconductivity in the Falikov-Kimball model with the Pair Hopping
• Thermopower signatures and spectroscopy of the canyon of conductance suppression
• Quantum criticality and formation of a singular Fermi liquid in the attractive SU(N > 2) Anderson model
• A Strongly Correlated Quantum-Dot Heat Engine with Optimal Performance: An Non-equilibrium Green's function Approach
• Quantum phase transitions in superconductor--quantum-dot--superconductor Josephson structures with attractive intradot interaction
• Resonant scattering induced thermopower in one-dimensional disordered systems
• Charge Kondo Effect in Thermoelectric Properties of Lead Telluride doped with Thallium Impurities