Edge states in dichalcogenide nanoribbons and triangular quantum dots
Abstract
The electronic structure of monolayer MoS2 nanoribbons and quantum dots have been investigated by means of an effective k· p two-band model. Both systems with borders exhibit states spatially localized on the edges and with energies lying in the band gap. We show that the conduction and valence band curvatures determine the presence/absence of these states whose origin has been related to the marginal topological properties of the MoS2 single-valley Hamiltonian.
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