Thermoelectric effect in a serial two-quantum-dot

Chi, Feng; Zheng, Jun; Lu, Xiaodong; Zhang, Kaicheng

doi:10.1016/j.physleta.2011.02.005

Cited by 41 publications

(38 citation statements)

References 36 publications

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“…It should be noted that throughout this paper phonon's contribution to thermal conductance has been neglected as it can be controlled to be rather small. 14) At last but not least, our numerical calculation results show that the thermoelectric properties (electrical conductance G, thermal conductance ¬, thermopower S and figure of merit ZT) of the T-shaped quantum dot with relatively strong on-site Coulomb interaction, are mainly influenced by the bipolar effect, which is consistent with some theoretical and experimental results. …”

Section: Discussionsupporting

confidence: 88%

Thermoelectric Properties of a T-Shaped Quantum Dot with Relatively Strong On-Site Coulomb Interaction

Cao

2014

Mater. Trans.

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The thermoelectric properties of a correlated T-shaped quantum dot system symmetrically coupled to two metallic leads are studied. This system is described by a generalized Anderson model and an approximation of correlation dynamics is employed to derive the corresponding Green's functions. The properties are investigated by calculating the electrical conductance G, thermal conductance ¬, thermopower S and figure of merit ZT for different gate voltages and temperatures. At last but not least, our numerical calculation results show that the thermoelectric properties of the T-shaped quantum dot with relatively strong on-site Coulomb interaction are mainly influenced by the bipolar effect, which is consistent with some theoretical and experimental results.

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Section: Discussionsupporting

confidence: 88%

Thermoelectric Properties of a T-Shaped Quantum Dot with Relatively Strong On-Site Coulomb Interaction

Cao

2014

Mater. Trans.

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“…Later on, similar systems consisting of a single or double quantum dot have been extensively studied with the aim to find configurations with enhanced Seebeck coefficient S c or thermoelectric figure of merit Z c T [13,[29][30][31][32][33][34] or their spin counterparts i.e. spin Seebeck coefficient S s and spin thermoelectric figure of merit Z s T [12,13,29,[35][36][37][38][39][40][41][42][43][44][45][46][47][48][49].…”

Section: Introductionmentioning

confidence: 99%

“…It has been found inter alia that the thermoelectric figure of merit may be increased by Coulomb [50] and interference effects as well as direct hopping between the dots [51][52][53][54][55]. Impressive numerous experiments on the double quantum dots have to be noted [56][57][58][59] including those reporting the observation of the Kondo effect [60][61][62].…”

Section: Introductionmentioning

confidence: 99%

Quantum dot as spin current generator and energy harvester

Szukiewicz

Wysokiński

2015

Eur. Phys. J. B

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Abstract. The thermoelectric transport in the device composed of a central nanoscopic system in contact with two electrodes and subject to the external magnetic field of Zeeman type has been studied. The device can support pure spin current in the electrodes and may serve as a source of the temperature induced spin currents with possible applications in spintronics. The system may also be used as an energy harvester. We calculate its thermodynamic efficiency η and the power output P . The maximal efficiency of the device reaches the Carnot value when the device works reversibly but with the vanishing power. The interactions between carriers diminish the maximal efficiency of the device, which under the constant load drops well below the Carnot limit but may exceed the Curzon-Ahlborn limit. While the effect of intradot Coulomb repulsion on η depends on the parameters, the interdot/interlevel interaction strongly diminishes the device efficiency.

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“…Few articles have analyzed thermopower through a DQD in just recent years [27,28,29]. F. Chi and co-workers [28] showed ZT has two huge peaks in the vicinity of the electron-hole symmetry points. Trocha and J. Barnaś [29] reported ZT in DQD systems is enhanced due to Coulomb interactions and interference effects.…”

Section: Introductionmentioning

confidence: 99%

Thermoelectric effects in a double quantum dot system weakly coupled to ferromagnetic leads

Tagani

Soleimani

2012

Solid State Communications

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Thermoelectric effects through a serial double quantum dot system weakly coupled to ferromagnetic leads are analyzed. Formal expressions of electrical conductance, thermal conductance, and thermal coefficient are obtained by means of Hubbard operators. Results show that although thermopower is independent of polarization of leads, figure of merit is reduced by increase of polarization. Influences of temperature and interdot tunneling on the figure of merit are also investigated, and observed that increase of the interdot tunneling strength results in reduction of the figure of merit. Effect of temperature on the thermal conductance is also analyzed.

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Thermoelectric effect in a serial two-quantum-dot

Cited by 41 publications

References 36 publications

Thermoelectric Properties of a T-Shaped Quantum Dot with Relatively Strong On-Site Coulomb Interaction

Thermoelectric Properties of a T-Shaped Quantum Dot with Relatively Strong On-Site Coulomb Interaction

Quantum dot as spin current generator and energy harvester

Thermoelectric effects in a double quantum dot system weakly coupled to ferromagnetic leads

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