title: The quasiparticle band dispersion in epitaxial multilayer silicene.
abstract: The growth of multilayer silicene is an exciting challenge for the future of silicon nano-electronics. Here, we use angle-resolved photoemission spectroscopy to map the entire Brillouin zone (BZ) of (√3 × √3)R30° reconstructed epitaxial multilayer silicene islands, growing on top of the first (3 × 3) reconstructed silicene wetting layer, on Ag(111) substrates. We found Λ- and V-shape linear dispersions, which we relate to the π and π* bands of massless quasiparticles in multilayer silicene, at the BZ centre [Formula: see text] and at all the [Formula: see text] centres of the (√3 × √3)R30° Brillouin zones in the extended scheme, due to folding of the Dirac cones at the [Formula: see text] and [Formula: see text] points of the (1 × 1) silicene BZ. The Fermi velocity of ∼0.3 × 10(6) m s(-1) obtained is highly promising for potential silicene-based devices.
authors.affiliation: Consiglio Nazionale delle Ricerche-ISM, via Fosso del Cavaliere 100, I-00133 Roma, Italy. paola.depadova@ism.cnr.it
authors.forename: Paola
authors.initials: P
authors.lastname: De Padova
authors.forename: Jose
authors.initials: J
authors.lastname: Avila
authors.forename: Andrea
authors.initials: A
authors.lastname: Resta
authors.forename: Ivy
authors.initials: I
authors.lastname: Razado-Colambo
authors.forename: Claudio
authors.initials: C
authors.lastname: Quaresima
authors.forename: Carlo
authors.initials: C
authors.lastname: Ottaviani
authors.forename: Bruno
authors.initials: B
authors.lastname: Olivieri
authors.forename: Thomas
authors.initials: T
authors.lastname: Bruhn
authors.forename: Patrick
authors.initials: P
authors.lastname: Vogt
authors.forename: Maria Carmen
authors.initials: MC
authors.lastname: Asensio
authors.forename: Guy
authors.initials: G
authors.lastname: Le Lay