Multilayer Silicene: a clear evidence
  One year after the publication of the seminal paper on monolayer 3 by 3 reconstructed silicene grown on a silver (111) substrate, evidence of the synthesis of epitaxial root3 by root3 reconstructed multilayer silicene hosting Dirac fermions was presented. Although a general consensus was immediately reached in the former case, in the latter one, the mere existence of multilayer silicene was questioned and strongly debated. Here, we demonstrate by means of a comprehensive x-ray crystallographic study, that multilayer silicene is effectively realized upon growth at rather low growth temperatures (~200{\deg}C), while, instead, 3D growth of silicon crystallites takes place at higher temperatures, (~300{\deg}C). This transition to bulk like silicon perfectly explains the various data presented and discussed in the literature and solves their conflicting interpretations. 
Paola De Padova, Amanda Generosi, Barbara Paci, Carlo Ottaviani,   Claudio Quaresima, Bruno Olivieri, Eric Salomon, Thierry ...
cond-mat.mtrl-sci