Double quantum dot as a minimal thermoelectric generator

Donsa, Stefan; Andergassen, Sabine; Held, Karsten

doi:10.1103/physrevb.89.125103

Cited by 52 publications

(40 citation statements)

References 48 publications

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“…In the presence of interaction and at low temperature, the Kondo effect is expected to dominate the transport properties [31][32][33][34][35][36]. The present investigation, which significantly extends our previous studies of non-equilibrium screening effects [37] in three-terminal two-quantum-dot heat engines [28,38], is important for a better understanding of the interaction effects in far-from-equilibrium situations and in the Kondo regime.…”

Section: Introductionsupporting

confidence: 71%

Two- and three-terminal far-from-equilibrium thermoelectric nano-devices in the Kondo regime

Eckern

Wysokiński

2020

New J. Phys.

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This paper analyses the thermoelectric power of two-and three-terminal quantum dot devices under large thermal ΔT and voltage V biases, and their performance as thermoelectric heat engines. The focus is on the interaction between electrons, far-from-equilibrium conditions, and strongly nonlinear transport, which all are important factors affecting the usefulness of the devices. To properly characterise the thermoelectric properties under such conditions, two different Seebeck coefficients are introduced, generalizing the linear response expression. In agreement with previous work, we find that the efficiency of the three-terminal thermoelectric heat engine, as measured by the delivered power, is optimal far from equilibrium. Moreover, strong Coulomb interactions between electrons on the quantum dot are found to diminish the efficiency at maximum power, and the maximal value of the delivered power, both in the Kondo regime and beyond.

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Section: Introductionsupporting

confidence: 71%

Two- and three-terminal far-from-equilibrium thermoelectric nano-devices in the Kondo regime

Eckern

Wysokiński

2020

New J. Phys.

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“…The interplay between strong correlations and various interference effects significantly modifies transport properties of systems based on double quantum dots [42][43][44][45][46][47][48][49][50]. Particularly, the interplay of Dicke and Kondo effects has been predicted to greatly increase transport characteristics in quantum dot systems [23,51,52] and is likely to increase thermoelectric power of the system [50,[53][54][55].…”

Section: Introductionmentioning

confidence: 99%

Spin-dependent thermoelectric effects in a strongly correlated double quantum dot

Karwacki¹,

Trocha²

2016

Phys. Rev. B

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We investigate spin-dependent thermoelectric transport through a system of two coupled quantum dots attached to reservoirs of spin-polarized electrons. Generally, we focus on the strongly correlated regime of transport. To this end, a slave-boson method for finite U is employed. Our main goal is to show that, apart from complex low-temperature physics, such a basic multilevel system provides a possibility to examine various quantum interference effects, with particular emphasis put on the influence of such phenomena on thermoelectric transport. Apart from the influence of interference effects on spin-degenerate charge transport, we show how spin-dependent transport, induced by ferromagnetic leads, can be modified as well. Finally, we also consider the case where the spin-relaxation time in the ferromagnetic leads is relatively long, which leads to the so-called spin thermoelectric effects.

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“…Only recently has the investigation of thermoelectric effects in quantum-dot structures in three-terminal geometries generated a lot of attention [44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59]. This was motivated by a number of reasons.…”

Section: Introductionmentioning

confidence: 99%

Thermoelectric energy harvesting with quantum dots

2014

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Abstract. We review recent theoretical work on thermoelectric energy harvesting in multi-terminal quantum-dot setups. We first discuss several examples of nanoscale heat engines based on Coulomb-coupled conductors. In particular, we focus on quantum dots in the Coulomb-blockade regime, chaotic cavities and resonant tunneling through quantum dots and wells. We then turn towards quantum-dot heat engines that are driven by bosonic degrees of freedom such as phonons, magnons and microwave photons. These systems provide interesting connections to spin caloritronics and circuit quantum electrodynamics.

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Double quantum dot as a minimal thermoelectric generator

Cited by 52 publications

References 48 publications

Two- and three-terminal far-from-equilibrium thermoelectric nano-devices in the Kondo regime

Two- and three-terminal far-from-equilibrium thermoelectric nano-devices in the Kondo regime

Spin-dependent thermoelectric effects in a strongly correlated double quantum dot

Thermoelectric energy harvesting with quantum dots

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