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作者:

Yang, Kai -Hua (Yang, Kai -Hua.) | Liang, Xiao-Hui (Liang, Xiao-Hui.) | Wang, Huai -Yu (Wang, Huai -Yu.) | Wu, Yi -Fan (Wu, Yi -Fan.) | Guo, Hong -Wei (Guo, Hong -Wei.) | Wei, Zi-Jia (Wei, Zi-Jia.)

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EI Scopus SCIE

摘要:

In this work, we study the thermoelectric properties of the parallel-coupled double quantum dot connected to Luttinger liquid (LL) leads. By applying nonequilibrium Green's function methods, the expressions of the electron current, heat currents, and transport coefficients are derived. We mainly focus on the effect of intralead Coulomb interaction and the spatial asymmetry of the system. Various causes for the enhancement of the thermoelectric efficiency are investigated. We find that Coulomb interactions in the LL not only enhance quantum interference but also considerably enhance thermoelectric effects. For moderately strong intralead interaction, the figure of merit can be considerably high and reach over 60 in the case of weakly coupled to LL leads and detuning of the energy levels, while in the case of strongly coupled to LL leads and the two aligned levels, the figure of merit approaches 8. The quantum interference induced by the Coulomb interaction yields a very high thermoelectric efficiency when the intralead interaction is very strong. These results may provide a design rule for the development of high-efficiency thermoelectric devices and facilitate optimization of device performance.

关键词:

Thermoelectric effect Fano effect Luttinger liquid Antiresonance

作者机构:

  • [ 1 ] [Yang, Kai -Hua]Beijing Univ Technol, Beijing 100124, Peoples R China
  • [ 2 ] [Liang, Xiao-Hui]Beijing Univ Technol, Beijing 100124, Peoples R China
  • [ 3 ] [Wu, Yi -Fan]Beijing Univ Technol, Beijing 100124, Peoples R China
  • [ 4 ] [Guo, Hong -Wei]Beijing Univ Technol, Beijing 100124, Peoples R China
  • [ 5 ] [Wei, Zi-Jia]Beijing Univ Technol, Beijing 100124, Peoples R China
  • [ 6 ] [Wang, Huai -Yu]Tsinghua Univ, Beijing 100084, Peoples R China

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来源 :

PHYSICS LETTERS A

ISSN: 0375-9601

年份: 2023

卷: 492

2 . 6 0 0

JCR@2022

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