Low hydrogen coverage Z2 topological phase transition in plumbene

Two-dimensional group IV monolayers with low-buckled honeycomb structures are reported as Z2 topological insulators. However, despite the strong spin–orbit coupling, the 2D lead monolayer (known as plumbene) exhibits a trivial insulator electronic state. Here we have studied the possible trivial to...

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Bibliographic Details
Published in:Solid state communications 2023-10, Vol.371, Article 115238
Main Authors: Dowlatabadi, M., Modarresi, M., Roknabadi, M. Rezaei, Mogulkoc, A.
Format: Article
Language:English
Subjects:
2D material
Plumbene
Topological insulator
Online Access:Get full text
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Summary:Two-dimensional group IV monolayers with low-buckled honeycomb structures are reported as Z2 topological insulators. However, despite the strong spin–orbit coupling, the 2D lead monolayer (known as plumbene) exhibits a trivial insulator electronic state. Here we have studied the possible trivial to Z2 topological phase transition in plumbene monolayer with low-density H decoration using the density-functional theory calculations. The adsorption of the H atom on the plumbene monolayer is energetically favorable. We examined different configurations for the adsorption of one and two H atoms on the plumbene surface. The H decoration of the surface causes the trivial to Z2 topological phase transition in the plumbene monolayer. The topological phase transition depends on the density and order of H atoms on the plumbene surface. [Display omitted] •We show the topological phase transition for Hydrogen decorated Plumbene monolayer.•The topological/trivial phase of Plumbene monolayer depends on the Hydrogen pattern.•The Hydrogen adsorption on plumbene forms a stable chemical bond.
ISSN:0038-1098
1879-2766
DOI:10.1016/j.ssc.2023.115238