Highly Biaxially Strained Silicene on Au(111)
Daniele Nazzari, Jakob Genser, Viktoria Ritter, Ole Bethge, E. Bertagnolli, Georg Ramer, Bernhard Lendl, Kenji Watanabe, Takashi Taniguchi, Riccardo Rurali, Miroslav Kolı́bal, Alois Lugstein
Abstract
investigation, we passivated the silicene on Au(111) by encapsulating it under few layers hBN or graphene flakes. The observed spectrum is characterized by vibrational modes that are strongly red-shifted with respect to the ones expected for freestanding silicene. By comparing low-energy electron diffraction (LEED) patterns and Raman results with first-principles calculations, we show that the vibrational modes indicate a highly (>7%) biaxially strained silicene phase.
Topics & Concepts
SiliceneMaterials scienceRaman spectroscopyGrapheneMonolayerCondensed matter physicsBrillouin zoneBand gapSiliconElectron diffractionNanotechnologyOptoelectronicsDiffractionOpticsPhysicsGraphene research and applicationsTopological Materials and PhenomenaQuantum and electron transport phenomena