From laterally modulated two-dimensional electron gas towards artificial graphene

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DOIResolve DOI: http://doi.org/10.1088/1367-2630/14/5/053002
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TypeArticle
Journal titleNew Journal of Physics
ISSN1367-2630
Volume14
Article number53002
SubjectEffective potentials; Far-infrared; GaAs; Lateral patterning; Lateral superlattice; Miniband structures; Minibands; Nonlinear dependence; Perturbative calculations; Resonance position; Electron gas; Magnetic fields; Graphene
AbstractCyclotron resonance has been measured in far-infrared transmission of GaAs/Al xGa 1-xAs heterostructures with an etched trigonal lateral superlattice intended to mimic graphene with lattice constant of the order of 100 nm (about 1000 times larger than that of natural graphene). Nonlinear dependence of the resonance position on magnetic field was observed, as well as its splitting into several modes. Our explanation, based on a perturbative calculation, describes the observed phenomena as a weak effect of the lateral potential on the twodimensional electron gas. Using this approach, we found a correlation between parameters of the lateral patterning and the created effective potential and obtained thus insights into how the electronic miniband structure has been tuned. The miniband dispersion was calculated using a simplified model and allowed us to formulate four basic criteria that have to be satisfied to reach graphene-like physics in such systems. © IOP Publishing Ltd and Deutsche Physikalische Gesellschaft.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); NRC Institute for Microstructural Sciences (IMS-ISM)
Peer reviewedYes
NPARC number21269534
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Record identifier98df1053-ffa2-4e9f-a621-48bbca4a80b9
Record created2013-12-12
Record modified2016-05-09
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