Anomalous growth of thermoelectric power in gapped graphene (Articolo in rivista)

Type
Label
  • Anomalous growth of thermoelectric power in gapped graphene (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.86.035430 (literal)
Alternative label
  • S. G. Sharapov a, A. A. Varlamov b (2012)
    Anomalous growth of thermoelectric power in gapped graphene
    in Physical review. B, Condensed matter and materials physics
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • S. G. Sharapov a, A. A. Varlamov b (literal)
Pagina inizio
  • 035430 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://link.aps.org/doi/10.1103/PhysRevB.86.035430 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 86 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 5 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 3 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • a Bogolyubov Institute for Theoretical Physics, National Academy of Science of Ukraine, 14-b Metrologicheskaya Street, Kiev 03680, Ukraine and Mediterranean Institute for Fundamental Physics, Rome, Italy b CNR-SPIN, University \"Tor Vergata\", Viale del Politecnico 1, I-00133 Rome, Italy and Mediterranean Institute for Fundamental Physics, Rome, Italy (literal)
Titolo
  • Anomalous growth of thermoelectric power in gapped graphene (literal)
Abstract
  • There exist experiments indicating that at certain conditions, such as an appropriate substrate, a gap of the order of 10 meV can be opened at the Dirac points of a quasiparticle spectrum of graphene. We demonstrate that the opening of such a gap can result in the appearance of a fingerprint bump of the Seebeck signal when the chemical potential approaches the gap edge. The magnitude of the bump can be up to one order higher than the already large value of the thermopower occurring in graphene. Such a giant effect, accompanied by the nonmonotonous dependence on the chemical potential, is related to the emergence of a new channel of quasiparticle scattering from impurities with the relaxation time strongly dependent on the energy. We analyze the behavior of conductivity and thermopower in such a system, accounting for quasiparticle scattering from impurities with the model potential in a self-consistent scheme. Reproducing the existing results for the case of gapless graphene, we demonstrate a failure of the simple Mott formula in the case under consideration. (literal)
Prodotto di
Autore CNR

Incoming links:


Autore CNR di
Prodotto
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi
data.CNR.it