核壳多边形量子环中的带隙角态。
In-gap corner states in core-shell polygonal quantum rings.
机构信息
Science Institute, University of Iceland, Reykjavik, IS-107, Iceland.
School of Science and Engineering, Reykjavik University, Reykjavik, IS-101, Iceland.
出版信息
Sci Rep. 2017 Jan 10;7:40197. doi: 10.1038/srep40197.
Abstract
We study Coulomb interacting electrons confined in polygonal quantum rings. We focus on the interplay of localization at the polygon corners and Coulomb repulsion. Remarkably, the Coulomb repulsion allows the formation of in-gap states, i.e., corner-localized states of electron pairs or clusters shifted to energies that were forbidden for non-interacting electrons, but below the energies of corner-side-localized states. We specify conditions allowing optical excitation to those states.
摘要
我们研究了处于多边形量子环中相互作用的库仑电子。我们关注的是在多边形角处的局域化和库仑排斥之间的相互作用。值得注意的是，库仑排斥允许形成带隙态，即电子对或簇的角局域态被转移到非相互作用电子被禁止的能量，但低于角边局域态的能量。我们指定了允许对这些态进行光学激发的条件。
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