Charge pumping in monolayer graphene driven by a series of time-periodic potentials

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Original languageEnglish
Pages (from-to)1159-1165
Journal / PublicationPhysics Letters, Section A: General, Atomic and Solid State Physics
Issue number12-13
Publication statusPublished - 27 Feb 2012


We applied the Floquet scattering-matrix formalism to studying the electronic transport properties in a mesoscopic Dirac system. Using the method, we investigate theoretically quantum pumping driven by a series of time-periodic potentials in graphene monolayer both in the adiabatic and non-adiabatic regimes. Our numerical results demonstrate that adding harmonic modulated potentials can break the time reversal symmetry when no voltage bias is applied to the graphene monolayer. Thus, when the system is pumped with proper dynamic parameters, these scatterers can produce a nonzero dc pumped current. We also find that the transmission is anisotropic as the incident angle is changed. © 2012 Elsevier B.V. All rights reserved.

Research Area(s)

  • Floquet scattering-matrix, Graphene, Pumping