Two-Dimensional Mott-Hubbard Electrons in an Artificial Honeycomb Lattice (Articolo in rivista)

Type
Label
  • Two-Dimensional Mott-Hubbard Electrons in an Artificial Honeycomb Lattice (Articolo in rivista) (literal)
Anno
  • 2011-01-01T00:00:00+01:00 (literal)
Alternative label
  • Singha A., M. Gibertini, B. Karmakar, S. Yuan, M. Polini, G. Vignale, M. I. Katsnelson, A. Pinczuk, L. N. Pfeiffer, K. W. West, and V. Pellegrini (2011)
    Two-Dimensional Mott-Hubbard Electrons in an Artificial Honeycomb Lattice
    in Science (N. Y., N.Y.)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Singha A., M. Gibertini, B. Karmakar, S. Yuan, M. Polini, G. Vignale, M. I. Katsnelson, A. Pinczuk, L. N. Pfeiffer, K. W. West, and V. Pellegrini (literal)
Pagina inizio
  • 1176 (literal)
Pagina fine
  • 1179 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 332 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Titolo
  • Two-Dimensional Mott-Hubbard Electrons in an Artificial Honeycomb Lattice (literal)
Abstract
  • Artificial crystal lattices can be used to tune repulsive Coulomb interactions between electrons. We trapped electrons, confined as a two-dimensional gas in a gallium arsenide quantum well, in a nanofabricated lattice with honeycomb geometry. We probed the excitation spectrum in a magnetic field, identifying collective modes that emerged from the Coulomb interaction in the artificial lattice, as predicted by the Mott-Hubbard model. These observations allow us to determine the Hubbard gap and suggest the existence of a Coulomb-driven ground state. (literal)
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