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 shif...

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Bibliographic Details
Published inarXiv.org
Main Authors Sitek, Anna, Tolea, Mugurel, Nita, Marian, Serra, Llorenç, Gudmundsson, Vidar, Manolescu, Andrei
Format Paper Journal Article
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 11.01.2017
Subjects
Electrons
Physics - Mesoscale and Nanoscale Physics
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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 uncoupled electrons, but below the energies of side-localized states. We also specify conditions allowing optical excitation of those states.
ISSN:2331-8422
DOI:10.48550/arxiv.1607.02107