Titre:	Transport of quasiparticles in coronene-based graphene nanoribbons
Auteur(s):	Pereira Júnior, Marcelo Lopes Enders Neto, Bernhard Georg Giozza, William Ferreira Sousa Júnior, Rafael Timóteo de Silva, Geraldo Magela e Ribeiro Júnior, Luiz Antônio
metadata.dc.identifier.orcid:	https://orcid.org/0000-0002-2662-0887 https://orcid.org/0000-0002-3003-3458 https://orcid.org/0000-0003-1101-3029 https://orcid.org/0000-0001-7468-2946
metadata.dc.contributor.affiliation:	University of Brasília, Institute of Physics University of Brasília, PPGCIMA, Campus Planaltina University of Brasília, Department of Electrical Engineering University of Brasília, Department of Electrical Engineering University of Brasília, Institute of Physics University of Brasília, Institute of Physics University of Brasília, PPGCIMA, Campus Planaltina
Assunto::	Quasipartículas Nanofitas de grafeno
Date de publication:	2020
Editeur:	The Royal Society of Chemistry
Référence bibliographique:	PEREIRA JÚNIOR, Marcelo Lopes et al. Transport of quasiparticles in coronene-based graphene nanoribbons. Journal of Materials Chemistry C, [S. l.], v. 8, n. 35, 12100, p. 12100-12107, 2020. DOI: https://doi.org/10.1039/D0TC01319F.
Abstract:	Inspired by accomplishments of graphene in nanoelectronics, several carbon allotropes were proposed recently. Computational and experimental studies have been performed to describe their fundamental features toward improvement in applications regarding energy conversion and storage. However, investigations about crucial aspects behind the material’s performance, such as the formation and dynamics of charge carriers, are missing for several of those allotropes so far. Here, we numerically investigate the stability and transport properties of polarons and bipolarons in coronene-based graphene nanoribbons (CNRs), which were recently synthesized. A 2D tight-binding Hamiltonian endowed with lattice relaxation effects is developed to describe the formation of these quasiparticle species. A semiclassical transport approach is used to study the stationary and dynamical properties of charge carriers in the presence of an external electric field. Remarkably, the results reveal that polaron and bipolaron formation takes place in both armchair and zigzag CNRs but, only in the former, these quasiparticles are mobile. The mobility of polarons is considerably higher than that of bipolarons, once the latter have larger effective mass. In contrast, bipolarons are more stable and support electrical field strengths of higher intensity than polarons.
metadata.dc.description.unidade:	Instituto de Física (IF) Faculdade UnB Planaltina (FUP) Faculdade de Tecnologia (FT) Departamento de Engenharia Elétrica (FT ENE)
metadata.dc.description.ppg:	Programa de Pós-Graduação em Ciência de Materiais
DOI:	https://doi.org/10.1039/D0TC01319F
metadata.dc.relation.publisherversion:	https://pubs.rsc.org/en/content/articlelanding/2020/tc/d0tc01319f
Collection(s) :	Artigos publicados em periódicos e afins

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