Making Massless Dirac Fermions from Patterned Two-Dimensional Electron Gases

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dc.creatorPark, Cheol-Hwan
dc.creatorLouie, Steven G.
dc.date2008-08-22
dc.date2009-05-13
dc.date.accessioned2026-07-07T13:13:51Z
dc.date.available2026-07-07T13:13:51Z
dc.descriptionAnalysis 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.
dc.description5 pages, 4 figures, significant revision of abstract, text, and figures
dc.identifierhttps://arxiv.org/abs/0808.3127
dc.identifierhttp://arxiv.org/abs/0808.3127
dc.identifierNano Lett. 9, 1793-1797 (2009)
dc.identifierdoi:10.1021/nl803706c
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/230025
dc.subjectMesoscale and Nanoscale Physics
dc.titleMaking Massless Dirac Fermions from Patterned Two-Dimensional Electron Gases
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