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

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

2010-08-03

arxiv.org/abs/1008.0463v4

Physics Letters A 376 (2012) 1159-1165

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

8 pages, 6 figures

Scientific paper

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.

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