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  • Silva, Gesiel Gomes, et al. (author)
  • Bipolaron Dynamics in Graphene Nanoribbons
  • 2019
  • In: Scientific Reports. - : NATURE PUBLISHING GROUP. - 2045-2322. ; 9
  • Journal article (peer-reviewed)abstract
    • Graphene nanoribbons (GNRs) are two-dimensional structures with a rich variety of electronic properties that derive from their semiconducting band gaps. In these materials, charge transport can occur via a hopping process mediated by carriers formed by self-interacting states between the excess charge and local lattice deformations. Here, we use a two-dimensional tight-binding approach to reveal the formation of bipolarons in GNRs. Our results show that the formed bipolarons are dynamically stable even for high electric field strengths when it comes to GNRs. Remarkably, the bipolaron dynamics can occur in acoustic and optical regimes concerning its saturation velocity. The phase transition between these two regimes takes place for a critical field strength in which the bipolaron moves roughly with the speed of sound in the material.
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Type of publication
journal article (1)
Type of content
peer-reviewed (1)
Author/Editor
Ribeiro, Luiz Antoni ... (1)
Magela e Silva, Gera ... (1)
de Almeida Fonseca, ... (1)
Pereira Junior, Marc ... (1)
de Sousa Junior, Raf ... (1)
Silva, Gesiel Gomes (1)
University
Linköping University (1)
Language
English (1)
Research subject (UKÄ/SCB)
Natural sciences (1)
Year
2019 (1)

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