Low hydrogen coverage Z2 topological phase transition in plumbene

Dowlatabadi M., Modarresi M., Roknabadi M. R., MOĞULKOÇ A.

Solid State Communications, cilt.371, 2023 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 371
  • Basım Tarihi: 2023
  • Doi Numarası: 10.1016/j.ssc.2023.115238
  • Dergi Adı: Solid State Communications
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, PASCAL, Aerospace Database, Chemical Abstracts Core, Communication Abstracts, INSPEC, Metadex, DIALNET, Civil Engineering Abstracts
  • Anahtar Kelimeler: 2D material, Plumbene, Topological insulator
  • Ankara Üniversitesi Adresli: Evet

Özet

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.