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RESEARCH PRODUCT
Enhancing single-parameter quantum charge pumping in carbon-based devices
Luis E. F. Foa TorresHernán L. CalvoGianaurelio CunibertiClaudia Gomes Da Rochasubject
Floquet theoryMaterials scienceCondensed Matter - Mesoscale and Nanoscale Physicsta114Physics and Astronomy (miscellaneous)business.industryGrapheneFOS: Physical sciencesCarbon nanotubelaw.inventionCharge pumpingAmplitudelawMesoscale and Nanoscale Physics (cond-mat.mes-hall)OptoelectronicsbusinessQuantumOrder of magnitudeGraphene nanoribbonsdescription
We present a theoretical study of quantum charge pumping with a single ac gate applied to graphene nanoribbons and carbon nanotubes operating with low resistance contacts. By combining Floquet theory with Green's function formalism, we show that the pumped current can be tuned and enhanced by up to two orders of magnitude by an appropriate choice of device length, gate voltage intensity and driving frequency and amplitude. These results offer a promising alternative for enhancing the pumped currents in these carbon-based devices.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2011-01-01 | Applied Physics Letters |