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

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

Publication Type:

Journal Article

Source:

Scientific Reports, Volume 7 (2017)

ISBN:

2045-2322

Abstract:

<p>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.</p>