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Stabilization of silicene and preservation of its structural and electronic properties are essential for its processing and future integration into devices. The stacking of silicene on stanene, creating a Xene-based heterostructure, proves to be a viable new route in this respect. Here we demonstrate the effectiveness of a stanene layer in breaking the strong interaction between silicene and the Ag(111) substrate. The role of stanene as a ‘buffer’ layer is investigated by analyzing the optical response of epitaxial silicene through both power-dependent Raman spectroscopy and reflectivity measurements in the near infrared (NIR)–ultraviolet (UV) spectral range. Finally, we point out a Xene-induced shift of the silver plasma edge that paves the way for the development of a new approach to engineering the metal plasmonic response.
Royal Society of Chemistry
Publication date: 
1 Jan 2022

Eleonora Bonaventura, Daya S Dhungana, Christian Martella, Carlo Grazianetti, Salvatore Macis, Stefano Lupi, Emiliano Bonera, Alessandro Molle

Biblio References: 
Volume: 7 Issue: 8 Pages: 924-930
Nanoscale Horizons