Sublattice asymmetry of impurity doping in graphene: A review

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In this review we highlight recent theoretical and experimental work on sublattice asymmetric doping of impurities in graphene, with a focus on substitutional nitrogen dopants. It is well known that one current limitation of graphene in regards to its use in electronics is that in its ordinary state it exhibits no band gap. By doping one of its two sublattices preferentially it is possible to not only open such a gap, which can furthermore be tuned through control of the dopant concentration, but in theory produce quasiballistic transport of electrons in the undoped sublattice, both important qualities for any graphene device to be used competetively in future technology. We outline current experimental techniques for synthesis of such graphene monolayers and detail theoretical efforts to explain the mechanisms responsible for the effect, before suggesting future research directions in this nascent field. © 2014 Lawlor and Ferreira; licensee Beilstein-Institut.




Lawlor, J. A., & Ferreira, M. S. (2014). Sublattice asymmetry of impurity doping in graphene: A review. Beilstein Journal of Nanotechnology.

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