Semimetal behavior of bilayer stanene

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Evazzade I., Roknabadi M. R., Morshedloo T., Modarresi M., MOĞULKOÇ Y., Far H. N.

PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES, cilt.89, ss.155-159, 2017 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 89
  • Basım Tarihi: 2017
  • Doi Numarası: 10.1016/j.physe.2017.02.016
  • Dergi Adı: PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.155-159
  • Anahtar Kelimeler: Bilayer stanene, Semimetal behavior, Topological insulators, First-principles calculations, SPIN HALL INSULATOR, TOPOLOGICAL INSULATOR, EXPERIMENTAL REALIZATION, ELECTRONIC-STRUCTURE, GRAPHENE, 1ST-PRINCIPLES, TEMPERATURE, SILICENE, STRAIN, SHEET
  • Ankara Üniversitesi Adresli: Evet

Özet

Stanene is a two-dimensional (2D) buckled honeycomb structure which has been studied recently owing to its promising electronic properties for potential electronic and spintronic applications in nanodevices. In this article we present a first-principles study of electronic properties of fluorinated bilayer stanene. The effect of tensile strain, intrinsic spin-orbit and van der Waals interactions are considered within the framework of density functional theory. The electronic band structure shows a very small overlap between valence and conduction bands at the Gamma point which is a characteristic of semimetal in fluorinated bilayer stanene. A relatively high value of tensile strain is needed to open an energy band gap in the electronic band structure and the parity analysis reveals that the strained nanostructure is a trivial insulator. According to our results, despite the monolayer fluorinated stanene, the bilayer one is not an appropriate candidate for topological insulator.