Kondo effect in triple quantum dots
Kondo effect in triple quantum dots
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DOI：
10.1103/physrevb.73.153307
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发表时间：
2006-01
影响因子：
3.7
通讯作者：
R. Žitko;J. Bonca;A. Ramšak;T. Rejec;T. Rejec
中科院分区：
文献类型：
--
作者：
R. Žitko;J. Bonca;A. Ramšak;T. Rejec;T. Rejec
对最简单的奇数耦合量子点系统的数值分析揭示了磁有序、电荷波动和导致屏蔽磁矩的巡游电子趋势之间的相互作用。随着点间耦合的增加，关联函数的演化中可以看到从局域矩到分子轨道行为的转变。由此产生的近藤相位在相图中，可以通过测量零偏置电导采样。通过与双量子点的比较，讨论了奇偶效应的起源。
Numerical analysis of the simplest odd-numbered system of coupled quantum dots reveals an interplay between magnetic ordering, charge fluctuations, and the tendency of itinerant electrons in the leads to screen magnetic moments. The transition from local-moment to molecular-orbital behavior is visible in the evolution of correlation functions as the interdot coupling is increased. Resulting Kondo phases are presented in a phase diagram which can be sampled by measuring the zero-bias conductance. We discuss the origin of the even-odd effects by comparing with the double quantum dot.