Quantum pumping with adiabatically modulated barriers in graphene

Details Quantum pumping with adiabatically modulated barriers in graphene Quantum pumping with adiabatically modulated barriers in graphene

2009-08-03

arxiv.org/abs/0908.0296v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

14 pages, 4 figures

Scientific paper

We study the adiabatic quantum pumping characteristics in the graphene modulated by two oscillating gate potentials out of phase. The angular and energy dependence of the pumped current is presented. The direction of the pumped current can be reversed when a high barrier demonstrates stronger transparency than a low one, which results from the Klein paradox. The underlying physics of the pumping process is illuminated.

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