Effects of interdot hopping and Coulomb blockade on the thermoelectric properties of serially coupled quantum dots

被引：13

作者：

Kuo, David M. T. ^{[2
,3
]}

Chang, Yia-Chung ^{[1
]}

机构：

[1] Acad Sinica, Res Ctr Appl Sci, Taipei 115, Taiwan

[2] Natl Cent Univ, Dept Elect Engn, Chungli 320, Taiwan

[3] Natl Cent Univ, Dept Phys, Chungli 320, Taiwan

来源：

NANOSCALE RESEARCH LETTERS | 2012年 / 7卷

关键词：

THERMAL CONDUCTANCE; DEVICES; MERIT;

D O I：

10.1186/1556-276X-7-257

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We have theoretically studied the thermoelectric properties of serially coupled quantum dots (SCQDs) embedded in an insulator connected to metallic electrodes. In the framework of Keldysh Green's function technique, the Landauer formula of transmission factor is obtained using the equation of motion method. Based on such analytical expressions of charge and heat currents, we calculate the electrical conductance, Seebeck coefficient, electron thermal conductance, and figure of merit (ZT) of SCQDs in the linear response regime. The effects of interdot hopping and electron Coulomb interactions on ZT are analyzed. We demonstrate that ZT is not a monotonic increasing function of interdot electron hopping strength (t(c)). We also show that in the absence of phonon thermal conductance, SCQD can reach the Carnot efficiency as t(c) approaches zero.

引用

页码：1 / 11

页数：6

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