Kagome-like silicene: A novel exotic form of two-dimensional epitaxial silicon

Sassa Y., Johansson F. O., Lindblad A., Yazdi M. G., Simonov K., Weissenrieder J., ...Daha Fazla

Applied Surface Science, cilt.530, 2020 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 530
  • Basım Tarihi: 2020
  • Doi Numarası: 10.1016/j.apsusc.2020.147195
  • Dergi Adı: Applied Surface Science
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, PASCAL, Aerospace Database, Chimica, Communication Abstracts, Compendex, INSPEC, Metadex, Civil Engineering Abstracts
  • Anahtar Kelimeler: 2D materials, Silicene, Scanning tunneling microscopy, DFT calculations, Angularresolved photoelectrons spectroscopy
  • Dokuz Eylül Üniversitesi Adresli: Hayır

Özet

Since the discovery of graphene, intensive efforts have been made in search of novel two-dimensional (2D) materials. Decreasing the materials dimensionality to their ultimate thinness is a promising route to unveil new physical phenomena, and potentially improve the performance of devices. Among recent 2D materials, analogs of graphene, the group IV elements have attracted much attention for their unexpected and tunable physical properties. Depending on the growth conditions and substrates, several structures of silicene, germanene, and stanene can be formed. Here, we report the synthesis of a Kagome-like lattice of silicene on aluminum (1 1 1) substrates. We provide evidence of such an exotic 2D Si allotrope through scanning tunneling microscopy (STM) observations, high-resolution core-level (CL) and angle-resolved photoelectron spectroscopy (ARPES) measurements, along with Density Functional Theory calculations.