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Silicene: Compelling Experimental Evidence for Graphenelike Two-Dimensional Silicon

Patrick Vogt, Paola De Padova, Claudio Quaresima, Jose Avila, Emmanouil Frantzeskakis, Maria Carmen Asensio, Andrea Resta, Bénédicte Ealet, and Guy Le Lay
Phys. Rev. Lett. 108, 155501 – Published 12 April 2012


Because of its unique physical properties, graphene, a 2D honeycomb arrangement of carbon atoms, has attracted tremendous attention. Silicene, the graphene equivalent for silicon, could follow this trend, opening new perspectives for applications, especially due to its compatibility with Si-based electronics. Silicene has been theoretically predicted as a buckled honeycomb arrangement of Si atoms and having an electronic dispersion resembling that of relativistic Dirac fermions. Here we provide compelling evidence, from both structural and electronic properties, for the synthesis of epitaxial silicene sheets on a silver (111) substrate, through the combination of scanning tunneling microscopy and angular-resolved photoemission spectroscopy in conjunction with calculations based on density functional theory.

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  • Received 28 December 2011


© 2012 American Physical Society

Authors & Affiliations

Patrick Vogt1,2,*, Paola De Padova3,†, Claudio Quaresima1, Jose Avila4, Emmanouil Frantzeskakis4, Maria Carmen Asensio4, Andrea Resta1, Bénédicte Ealet1, and Guy Le Lay1,3

  • 1Aix-Marseille University, CNRS-CINaM, Campus de Luminy, Case 913, 13288, Marseille Cedex 09, France
  • 2Technische Universität Berlin, Institut für Festkörperphysik, Hardenbergstrasse 36, 10623 Berlin, Germany
  • 3CNR-ISM, via Fosso del Cavaliere 100, Rome, Italy
  • 4Synchrotron SOLEIL, Saint Aubin, BP 48 91192 Gif-sur-Yvette, France

  • *patrick.vogt@tu-berlin.de
  • depadova@ism.cnr.it

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Vol. 108, Iss. 15 — 13 April 2012

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