Fano Effect on the Thermoelectric Efficiency in Parallel-Coupled Double Quantum Dots

被引：12
|
作者：
Zheng, Jun [2 ]
Zhu, Min-Jun [3 ]
Chi, Feng [1 ]
机构：
[1] Bohai Univ, Fac Engn, Jinzhou 121013, Peoples R China
[2] Chinese Acad Sci, Inst Semicond, State Key Lab Superlattices & Microstruct, Beijing 100083, Peoples R China
[3] Bohai Univ, Dept Phys, Jinzhou 121013, Peoples R China
来源：
JOURNAL OF LOW TEMPERATURE PHYSICS | 2012年 / 166卷 / 3-4期
关键词：
Thermoelectric effect; Quantum dots; Fano effect; ELECTRON-PHONON INTERACTION; STRONG MAGNETIC-FIELD; RESONANT SCATTERING; FIGURE; STATES; MERIT;
D O I：
10.1007/s10909-011-0417-2
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
With the help of the Green function technique and the equation of motion approach, we study the thermoelectric efficiency (characterized by the figure of merit) in parallel-coupled double quantum dots (QDs) system. It is found that the configurations of the dot-lead coupling strengths exert a significant impact on the figure of merit through the Fano effect, due to which electrons experience an abrupt change from resonant to antiresonant tunneling. The absolute value of the thermopower is increased by the Fano resonance and antiresonance, while the electrical conductance is separately enhanced and suppressed, leading to the enhancement of the thermal efficiency of the device.
引用
收藏
页码：208 / 217
页数：10
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