Universal conductivity and the electrodynamics of graphite at high pressures (Articolo in rivista)

Type
Label
  • Universal conductivity and the electrodynamics of graphite at high pressures (Articolo in rivista) (literal)
Anno
  • 2012-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1103/PhysRevB.86.035114 (literal)
Alternative label
  • A. Perucchi,1 L. Baldassarre,1 C. Marini,2,3 P. Postorino,2 F. Bernardini,4 S. Massidda,4 and S. Lupi2 (2012)
    Universal conductivity and the electrodynamics of graphite at high pressures
    in Physical review. B, Condensed matter and materials physics (Online)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • A. Perucchi,1 L. Baldassarre,1 C. Marini,2,3 P. Postorino,2 F. Bernardini,4 S. Massidda,4 and S. Lupi2 (literal)
Pagina inizio
  • 035114 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 86 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • 1 Sincrotrone Trieste S.C.p.A., Area Science Park, I-34012 Basovizza, Trieste, Italy 2 CNR-IOM and Dipartimento di Fisica, Universit`a di Roma \"La Sapienza\", Piazzale Aldo Moro 2, I-00185 Roma, Italy 3 European Synchrotron Radiation Facility, 6 Rue Jules Horowitz, BP220, 38043 Grenoble Cedex, France 4 CNR-IOM Unit`a SLACS and Dipartimento di Fisica, Universit`a di Cagliari, Cittadella Universitaria, I-09042 Monserrato (Ca), Italy (literal)
Titolo
  • Universal conductivity and the electrodynamics of graphite at high pressures (literal)
Abstract
  • We address the in-plane pressure-dependent electrodynamics of graphite through synchrotron-based infrared spectroscopy and ab initio density functional theory calculations. The Drude term remarkably increases upon pressure application, as a consequence of an enhancement of both electron and hole charge densities. This is due to the growth of the band dispersion along the kz direction between the K and H points of the Brillouin zone. On the other hand, the mid-infrared optical conductivity between 800 and 5000 cm-1 is almost flat, and very weakly pressure dependent, at least up to 7 GPa. This demonstrates a surprising robustness of the graphene-like universal quantum conductance of graphite, even when the interlayer distance is significantly reduced. (literal)
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