Optical and thermal responses of silicene in Xene heterostructures
Authors/Creators
- 1. CNR-IMM and Università degli Studi di Milano Bicocca
- 2. CNR-IMM
- 3. Università di Roma La Sapienza
- 4. Università degli Studi di Milano Bicocca
Description
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, creat- ing 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 investi- gated by analyzing the optical response of epitaxial silicene through both power-dependent Raman spectroscopy and reflectivity mea- surements 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.