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Impurity effects on polaron dynamics in graphene nanoribbons
University of Brasilia, Brazil.
Linköpings universitet, Institutionen för fysik, kemi och biologi, Teoretisk kemi. Linköpings universitet, Tekniska fakulteten. University of Brasilia, Brazil.
University of Brasilia, Brazil.
University of Brasilia, Brazil; University of Florida, FL 32611 USA; University of Florida, FL 32611 USA.
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2015 (engelsk)Inngår i: Carbon, ISSN 0008-6223, E-ISSN 1873-3891, Vol. 91, s. 171-177Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

The impurity effects on the dynamics of polarons in armchair graphene nanoribbons are numerically investigated in the scope of a two-dimensional tight-binding approach with lattice relaxation. The results show that the presence of an impurity changes significantly the net charge distribution associated to the polaron structure. Moreover, the interplay between external electric field and the local impurities plays the role of drastically modifying the polaron dynamics. Interestingly, nanoribbons containing mobile polarons are noted to take place even when considering high impurity levels, which is associated with the highly conductive character of the graphene nanoribbons. This investigation may enlighten the understanding of the charge transport mechanism in carbon-based nanomaterials. (C) 2015 Elsevier Ltd. All rights reserved.

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Elsevier , 2015. Vol. 91, s. 171-177
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URN: urn:nbn:se:liu:diva-120204DOI: 10.1016/j.carbon.2015.04.065ISI: 000356554500019OAI: oai:DiVA.org:liu-120204DiVA, id: diva2:842700
Tilgjengelig fra: 2015-07-21 Laget: 2015-07-20 Sist oppdatert: 2017-12-04

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