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

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

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 …