Stability of the Dirac cone in artificial graphene formed in quantum wells: A computational many-electron study

Ilkka Kylänpää, Fulvio Berardi, Esa Räsänen, Pablo García-González, Carlo Andrea Rozzi, Angel Rubio

    Tutkimustuotos: ArtikkeliScientificvertaisarvioitu

    3 Sitaatiot (Scopus)
    58 Lataukset (Pure)

    Abstrakti

    We carry out a comprehensive computational study on the stability of the Dirac cone in artificial graphene realized in nanopatterned quantum wells. Our real-space approach allows us to vary the size, shape, and positioning of the quantum dots in the hexagonal lattice. We compare the (noninteracting) single-particle calculations to density-functional studies within both local-density approximation and meta-generalized-gradient approximation. Furthermore, the density-functional results are compared against numerically precise path-integral quantum Monte Carlo calculations. As a whole, our results indicate high stability of the Dirac bands against external parameters, which is reassuring for further experimental investigations.

    AlkuperäiskieliEnglanti
    Artikkeli083014
    JulkaisuNew Journal of Physics
    Vuosikerta18
    Numero8
    DOI - pysyväislinkit
    TilaJulkaistu - 1 elok. 2016
    OKM-julkaisutyyppiA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä

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