In-gap corner states in core-shell polygonal quantum rings

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 shi...

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Bibliographic Details
Published in:Scientific Reports
Main Authors: Sitek, Anna, Ţolea, Mugurel, Niţă, Marian, Serra, Llorenç, Gudmundsson, Vidar, Manolescu, Andrei
Other Authors: University of Iceland, Icelandic Research Fund
Format: Article in Journal/Newspaper
Language:English
Published: Springer Nature 2017
Subjects:
Iceland
Online Access:http://hdl.handle.net/10261/173517
https://doi.org/10.1038/srep40197
Description
Summary: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. This work was financed by the Research Fund of the University of Iceland and the Icelandic Research Fund. Peer reviewed

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