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dc.contributor.authorGibertini, Marcoeng
dc.contributor.authorSingha, Achintyaeng
dc.contributor.authorPellegrini, Vittorioeng
dc.contributor.authorPolini, Marcoeng
dc.contributor.authorVignale, Giovanni, 1957-eng
dc.contributor.authorPinczuk, Aroneng
dc.contributor.authorPfeiffer, Loren N.eng
dc.contributor.authorWest, Ken W.eng
dc.date.issued2009eng
dc.descriptionURL:http://link.aps.org/doi/10.1103/PhysRevB.79.241406 DOI:10.1103/PhysRevB.79.241406eng
dc.description.abstractAt 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 a two-dimensional electron gas with a long-wavelength periodic potential with honeycomb symmetry can lead to the creation of isolated massless Dirac points with tunable Fermi velocity. We provide detailed theoretical estimates to realize such artificial graphenelike system and discuss an experimental realization in a modulation-doped GaAs quantum well. Ultrahigh-mobility electrons with linearly dispersing bands might open new venues for the studies of Dirac-fermion physics in semiconductors.eng
dc.description.sponsorshipThe authors acknowledge useful correspondence with S. G. Louie. M.P. acknowledges partial financial support from the CNR-INFM “Seed Projects.” G.V. acknowledges support from NSF Grant No. DMR-0705460 . A.P. was supported by the Nanoscale Science and Engineering Initiative of the National Science Foundation under NSF Grant No. CHE-0117752 and No. CHE-0641523, and by the New York State Office of Science, Technology, and Academic Research NYSTAR .eng
dc.identifier.citationPhys. Rev. B 79, 241406(R) (2009) [4 pages]eng
dc.identifier.issn1098-0121eng
dc.identifier.urihttp://hdl.handle.net/10355/7660eng
dc.languageEnglisheng
dc.publisherAmerican Physical Societyeng
dc.relation.ispartofcollectionUniversity of Missouri--Columbia. College of Arts and Sciences. Department of Physics and Astronomy. Physics and Astronomy publicationseng
dc.subject.lcshQuantum wellseng
dc.titleEngineering artificial graphene in a two-dimensional electron gaseng
dc.typeArticleeng


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