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arXiv 1807.08641cond-mat.mes-hall
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三重量子点中的吸引库仑相互作用

Attractive Coulomb interactions in a triple quantum dot

Changki Hong, Gwangsu Yoo, Jinhong Park, Min-Kyun Cho, Yunchul Chung, H. -S. Sim, Dohun Kim, Hyungkook Choi, Vladimir Umansky, Diana Mahalu

摘要:

实验研究了三重量子点(TQD)中由于库仑排斥作用引起的电子配对。研究发现,当第三个量子点与另外两个量子点通过库仑排斥作用强耦合时,TQD中的两个量子点中的电子配对由第三个量子点介导,从而使TQD处于(1,0,0)和(0,1,1)电荷组态的双重简并基态.使用传输光谱监测电子输运通过每个单独的点的TQD,我们分析如何实现在实验中的简并,如何简并与电子配对,以及由此产生的非平凡的行为的电子输运。我们的研究结果可以用来设计一个系统与非平凡的电子相关性和功能。

英文摘要:

Electron pairing due to a repulsive Coulomb interaction in a triple quantum dot (TQD) is experimentally studied. It is found that electron pairing in two dots of a TQD is mediated by the third dot, when the third dot strongly couples with the other two via Coulomb repulsion so that the TQD is in the twofold degenerate ground states of (1, 0, 0) and (0, 1, 1) charge configurations. Using the transport spectroscopy that monitors electron transport through each individual dot of a TQD, we analyze how to achieve the degeneracy in experiments, how the degeneracy is related to electron pairing, and the resulting nontrivial behavior of electron transport. Our findings may be used to design a system with nontrivial electron correlations and functionalities.

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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