Abstract
We study the addition energy spectra of phosphorene quantum dots,
focusing on the role of dot size, edge passivation, number of layers,
and dielectric constant of the substrate where the dots are deposited.
We show that for sufficiently low dielectric constants (epsilon(sub) <
4), Coulomb blockade can be observed in dot sizes larger than 10 nm, for
both passivated and unpassivated edges. For higher dielectric constants (up to epsilon(sub )= 30), Coulomb blockade demands smaller dot sizes,
but this depends on whether the edges are passivated or not. This
dramatic role played by the substrate is expected to impact the
development of applications based on phosphorene quantum dots.
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