Direct measurement of the Seebeck coefficient in a Kondo-correlated single-quantum-dot transistor

Abstract

We report on the first measurement of the Seebeck coefficient in a tunnel-contacted and gate-tunable individual single-quantum dot junction in the Kondo regime, fabricated using the electromigration technique. This fundamental thermoelectric parameter is obtained by directly monitoring the magnitude of the voltage induced in response to a temperature difference across the junction, while keeping a zero net tunneling current through the device. In contrast to bulk materials and single molecules probed in a scanning tunneling microscopy (STM) configuration, investigating the thermopower in nanoscale electronic transistors benefits from the electric tunability to showcase prominent quantum effects. Here, striking sign changes of the Seebeck coefficient are induced by varying the temperature, depending on the spin configuration in the quantum dot. The comparison with Numerical Renormalization Group (NRG) calculations demonstrate that the tunneling density of states is generically asymmetric around the Fermi level in the leads, both in the cotunneling and Kondo regimes.

References in corpus (34)

• Kondo Physics in a Single Electron Transistor
• A Tunable Kondo Effect in Quantum Dots
• The numerical renormalization group method for quantum impurity systems
• From the Kondo Regime to the Mixed-Valence Regime in a Single-Electron Transistor
• Kondo effect in an integer-spin quantum dot
• Transport Coefficients of the Anderson Model via the Numerical Renormalization Group
• The Kondo effect in C${}_{60}$ single-molecule transistors
• A quantum-dot heat engine operating close to the thermodynamic efficiency limits
• Quantum limit of heat flow across a single electronic channel
• Quantum phase transition in a single-molecule quantum dot
• Controlled Fabrication of Nanogaps in Ambient Environment for Molecular Electronics
• Simultaneous Determination of Conductance and Thermopower of Single Molecule Junctions
• Single-mode heat conduction by photons
• Kondo effect in quantum dots
• Thermopower of a Kondo-correlated quantum dot
• Anomalous Kondo-effect in Quantum Dot at non-zero bias
• Thermoelectric transport through strongly correlated quantum dots
• Kondo effect in real quantum dots
• Metal-nanoparticle single-electron transistors fabricated using electromigration
• Cotunneling thermopower of single electron transistors
• Tunable Quantum Criticality and Super-ballistic Transport in a `Charge' Kondo Circuit
• Characteristic Crossing Points in Specific Heat Curves of Correlated Systems
• Nonlinear thermovoltage and thermocurrent in quantum dots
• Thermopower of Aharonov-Bohm Interferometer with a Quantum Dot
• Effect of the Kondo correlation on thermopower in a Quantum Dot
• Thermal Conductance of a Single-Electron Transistor
• Field-Effect Control of Graphene-Fullerene Thermoelectric Nanodevices
• Feedback controlled electromigration in four-terminal nano-junctions
• Thermoelectric characterization of the Kondo resonance in nanowire quantum dots
• Universal zero-bias conductance for the single electron transistor. II: Comparison with numerical results
• Universality and the zero-bias conductance of the single-electron transistor
• Conductance scaling in Kondo correlated quantum dots: role of level asymmetry and charging energy
• Full density matrix numerical renormalization group calculation of impurity susceptibility and specific heat of the Anderson impurity model
• Impact of capacitance and tunneling asymmetries on Coulomb blockade edges and Kondo peaks in non-equilibrium transport through molecular quantum dots

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