Engineering artificial graphene in a two-dimensional electron gas
作者： Marco Gibertini , Achintya Singha , Vittorio Pellegrini , Marco Polini , Giovanni Vignale
DOI: 10.1103/PHYSREVB.79.241406
关键词:
摘要: At low energy, electrons in doped graphene sheets behave like massless Dirac fermions with a Fermi velocity, which does not depend on carrier density. Here we show that modulating two-dimensional electron gas long-wavelength periodic potential honeycomb symmetry can lead to the creation of isolated points tunable velocity. We provide detailed theoretical estimates realize such artificial graphenelike system and discuss an experimental realization modulation-doped GaAs quantum well. Ultrahigh-mobility linearly dispersing bands might open new venues for studies Dirac-fermion physics semiconductors.
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