Local moment formation in quantum point contacts
Local moment formation in quantum point contacts
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DOI：
10.1103/physrevlett.90.026804
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发表时间：
2003-01-17
影响因子：
8.6
通讯作者：
Wingreen, NS
中科院分区：
文献类型：
--
作者：
Hirose, K;Meir, Y;Wingreen, NS
量子点接触（QPC）的自旋密度泛函理论揭示了在点接触附近具有一个电子自旋网的局部矩的形成-支持了最近关于QPC中近道效应的报道。局域矩与引线的杂化随QPC变长而减小，而局域矩与引线的库仑相互作用能基本保持不变。
Spin-density-functional theory of quantum point contacts (QPCs) reveals the formation of a local moment with a net of one electron spin in the vicinity of the point contact-supporting the recent report of a Kondo effect in a QPC. The hybridization of the local moment to the leads decreases as the QPC becomes longer, while the on site Coulomb-interaction energy remains almost constant.