Large Band Gap Opening between Graphene Dirac Cones Induced by Na Adsorption onto an Ir Superlattice (Articolo in rivista)

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  • Large Band Gap Opening between Graphene Dirac Cones Induced by Na Adsorption onto an Ir Superlattice (Articolo in rivista) (literal)
Anno
  • 2012-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1021/nn203841q (literal)
Alternative label
  • Papagno M., Rusponi S., Makarovna Sheverdyaeva P., Vlaic S., Etzkorn M., Pacilé D., Moras P., Carbone C., Brune H. (2012)
    Large Band Gap Opening between Graphene Dirac Cones Induced by Na Adsorption onto an Ir Superlattice
    in ACS nano; ACS, American chemical society, Washington, DC (Stati Uniti d'America)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Papagno M., Rusponi S., Makarovna Sheverdyaeva P., Vlaic S., Etzkorn M., Pacilé D., Moras P., Carbone C., Brune H. (literal)
Pagina inizio
  • 199 (literal)
Pagina fine
  • 204 (literal)
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  • 6 (literal)
Rivista
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  • http://dx.doi.org/10.1021/nn203841q (literal)
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  • 1 (literal)
Note
  • ISI Web of Science (WOS) (literal)
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  • Istituto di Struttura della Materia, Consiglio Nazionale delle Ricerche, Trieste, Italy Institute of Condensed Matter Physics (ICMP), Station 3, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland Dipartimento di Fisica, Università della Calabria, and INFN-Gruppo collegato di Cosenza, 87036 Arcavacata di Rende (CS), Italy (literal)
Titolo
  • Large Band Gap Opening between Graphene Dirac Cones Induced by Na Adsorption onto an Ir Superlattice (literal)
Abstract
  • We investigate the effects of Na adsorption on the electronic structure of bare and Ir cluster superlattice-covered epitaxial graphene on Ir(111) using angle-resolved photoemission spectroscopy and scanning tunneling microscopy. At Na saturation coverage, a massive charge migration from sodium atoms to graphene raises the graphene Fermi level by 1.4 eV relative to its neutrality point. We find that Na is adsorbed on top of the graphene layer, and when coadsorbed onto an Ir cluster superlattice, it results in the opening of a large band gap of ”Na/Ir/G = 740 meV, comparable to the one of Ge and with preserved high group velocity of the charge carriers. (literal)
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