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Evidence for Flat Bands near the Fermi Level in Epitaxial Rhombohedral Multilayer Graphene.
Pierucci, Debora; Sediri, Haikel; Hajlaoui, Mahdi; Girard, Jean-Christophe; Brumme, Thomas; Calandra, Matteo; Velez-Fort, Emilio; Patriarche, Gilles; Silly, Mathieu G; Ferro, Gabriel; Soulière, Véronique; Marangolo, Massimiliano; Sirotti, Fausto; Mauri, Francesco; Ouerghi, Abdelkarim.
Afiliación
  • Pierucci D; †Laboratoire de Photonique et de Nanostructures (CNRS-LPN), Route de Nozay, 91460 Marcoussis, France.
  • Sediri H; †Laboratoire de Photonique et de Nanostructures (CNRS-LPN), Route de Nozay, 91460 Marcoussis, France.
  • Hajlaoui M; †Laboratoire de Photonique et de Nanostructures (CNRS-LPN), Route de Nozay, 91460 Marcoussis, France.
  • Girard JC; ‡Synchrotron-SOLEIL, Saint-Aubin, BP48, F91192 Cedex Gif sur Yvette, France.
  • Brumme T; †Laboratoire de Photonique et de Nanostructures (CNRS-LPN), Route de Nozay, 91460 Marcoussis, France.
  • Calandra M; §Institut de Minéralogie, de Physique des Matériaux, et de Cosmochimie, UMR CNRS 7590, Sorbonne Universités, UPMC, Univ. Paris VI, MNHN, IRD, 4 place Jussieu, 75005 Paris, France.
  • Velez-Fort E; §Institut de Minéralogie, de Physique des Matériaux, et de Cosmochimie, UMR CNRS 7590, Sorbonne Universités, UPMC, Univ. Paris VI, MNHN, IRD, 4 place Jussieu, 75005 Paris, France.
  • Patriarche G; †Laboratoire de Photonique et de Nanostructures (CNRS-LPN), Route de Nozay, 91460 Marcoussis, France.
  • Silly MG; §Institut de Minéralogie, de Physique des Matériaux, et de Cosmochimie, UMR CNRS 7590, Sorbonne Universités, UPMC, Univ. Paris VI, MNHN, IRD, 4 place Jussieu, 75005 Paris, France.
  • Ferro G; †Laboratoire de Photonique et de Nanostructures (CNRS-LPN), Route de Nozay, 91460 Marcoussis, France.
  • Soulière V; ‡Synchrotron-SOLEIL, Saint-Aubin, BP48, F91192 Cedex Gif sur Yvette, France.
  • Marangolo M; ∥Laboratoire des multimateriaux et Interfaces, UMR 5615, Université Claude Bernard Lyon I, 69100 Villeurbanne, France.
  • Sirotti F; ∥Laboratoire des multimateriaux et Interfaces, UMR 5615, Université Claude Bernard Lyon I, 69100 Villeurbanne, France.
  • Mauri F; ⊥UMR 7588, INSP, Sorbonne Universités, UPMC Univ Paris 06, 4 place Jussieu, F-75005 Paris, France.
  • Ouerghi A; #CNRS, UMR 7588, Institut des Nanosciences de Paris, 4 place Jussieu, F-75005 Paris, France.
ACS Nano ; 9(5): 5432-9, 2015 May 26.
Article en En | MEDLINE | ID: mdl-25893537
The stacking order of multilayer graphene has a profound influence on its electronic properties. In particular, it has been predicted that a rhombohedral stacking sequence displays a very flat conducting surface state: the longer the sequence, the flatter the band. In such a flat band, the role of electron-electron correlation is enhanced, possibly resulting in high Tc superconductivity, magnetic order, or charge density wave order. Here we demonstrate that rhombohedral multilayers are easily obtained by epitaxial growth on 3C-SiC(111) on a 2° off-axis 6H-SiC(0001). The resulting samples contain rhombohedral sequences of five layers on 70% of the surface. We confirm the presence of the flat band at the Fermi level by scanning tunneling spectroscopy and angle-resolved photoemission spectroscopy, in close agreement with the predictions of density functional theory calculations.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: ACS Nano Año: 2015 Tipo del documento: Article País de afiliación: Francia Pais de publicación: Estados Unidos
Texto completo
Añadir a Mi BVS
Imprimir
XML
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: ACS Nano Año: 2015 Tipo del documento: Article País de afiliación: Francia Pais de publicación: Estados Unidos