Making Massless Dirac Fermions from a Patterned Two-Dimensional Electron Gas

2008/08/31 by Cheol-Hwan Park, Steven G. Louie · 7 citations
Materials Science · Physics and Astronomy · #Graphene research and applications #Organic and Molecular Conductors Research #Topological Materials and Phenomena #cond-mat.mes-hall

paper · pdf · doi:10.1021/nl803706c

published as Nano Lett. 9, 1793-1797 (2009) · 5 pages, 4 figures, significant revision of abstract, text, and figures

openalex publication_date 2009/04/01 · arxiv created 2009/05/13 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

Analysis of the electronic structure of an ordinary two-dimensional electron gas (2DEG) under an appropriate external periodic potential of hexagonal symmetry reveals that massless Dirac fermions are generated near the corners of the supercell Brillouin zone. The required potential parameters are found to be achievable under or close to laboratory conditions. Moreover, the group velocity is tunable by changing either the effective mass of the 2DEG or the lattice parameter of the external potential, and it is insensitive to the potential amplitude. The finding should provide a new class of systems other than graphene for investigating and exploiting massless Dirac fermions using 2DEGs in semiconductors.

Citations

• Berry's Phase and Absence of Back Scattering in Carbon Nanotubes
• Impurity Scattering in Carbon Nanotubes – Absence of Back Scattering –
• Two-dimensional atomic crystals

Cited by

• Dirac electronic states in graphene systems: optical spectroscopy studies
• Symmetry classification of energy bands in graphene
• Velocity-modulation control of electron-wave propagation in graphene
• Making artificial p_x,y-orbital honeycomb electron lattice on metal surface
• Two-Dimensional Mott-Hubbard Electrons in an Artificial Honeycomb Lattice
• Geometric resonances in the magnetoresistance of hexagonal lateral superlattices
• Artificial honeycomb lattices for electrons, atoms and photons

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