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arXiv 1306.4946cond-mat.str-el
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Kondo关联下少电子量子点的热电势

Thermopower of few-electron quantum dots with Kondo correlations

LvZhou Ye, Dong Hou, Rulin Wang, Xiao Zheng, YiJing Yan

摘要:

采用分层运动方程方法研究了具有近藤关联的少电子量子点的热电势。热电势由谱函数在温度限定的窄能量窗内的线形决定。通过对单能级和二能级Anderson杂质模型的计算和分析,阐述了热电势与各种电子关联之间的内在联系。特别是,一个非常规的符号反转行为被预测为量子点与一个合适的层间间距。这一新特征突出了多水平效应的重要性及其与近藤相关性的相互作用。我们的发现和理解可能会导致量子点的新热电应用。

英文摘要:

The thermopower of few-electron quantum dots with Kondo correlations is investigated via a hierarchial equations of motion approach. The thermopower is determined by the line shape of spectral function within a narrow energy window defined by temperature. Based on calculations and analyses on single-level and two-level Anderson impurity models, the underlying relations between thermopower and various types of electron correlations are elaborated. In particular, an unconventional sign reversal behavior is predicted for quantum dots with a suitable inter-level spacing. The new feature highlights the significance of multi-level effects and their interplay with Kondo correlations. Our finding and understanding may lead to novel thermoelectric applications of quantum dots.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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