| Campo DC | Valor | Idioma |
|---|
| dc.contributor.author | Cassiano, Tiago de Sousa Araújo | - |
| dc.contributor.author | Sousa, Leonardo Evaristo de | - |
| dc.contributor.author | Ribeiro Júnior, Luiz Antônio | - |
| dc.contributor.author | Silva, Geraldo Magela e | - |
| dc.contributor.author | Oliveira Neto, Pedro Henrique de | - |
| dc.date.accessioned | 2023-11-21T15:39:43Z | - |
| dc.date.available | 2023-11-21T15:39:43Z | - |
| dc.date.issued | 2022-03-17 | - |
| dc.identifier.citation | CASSIANO, Tiago de Sousa Araújo et al. Charge transport in cove-type graphene nanoribbons: the role of quasiparticles. Synthetic Metals, v. 287, 117056, jul. 2022. DOI: https://doi.org/10.1016/j.synthmet.2022.117056. Disponível em: https://www.sciencedirect.com/science/article/pii/S0379677922000509?via%3Dihub. Acesso em: 21 nov. 2023. | pt_BR |
| dc.identifier.uri | http://repositorio2.unb.br/jspui/handle/10482/46884 | - |
| dc.language.iso | eng | pt_BR |
| dc.publisher | Elsevier B.V. | pt_BR |
| dc.rights | Acesso Aberto | pt_BR |
| dc.title | Charge transport in cove-type graphene nanoribbons : the role of quasiparticles | pt_BR |
| dc.type | Artigo | pt_BR |
| dc.subject.keyword | Grafeno | pt_BR |
| dc.subject.keyword | SSH | pt_BR |
| dc.subject.keyword | Polaron | pt_BR |
| dc.subject.keyword | Bipolaron | pt_BR |
| dc.subject.keyword | Transporte de carga | pt_BR |
| dc.subject.keyword | Nanofitas de grafeno | pt_BR |
| dc.rights.license | This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). | pt_BR |
| dc.identifier.doi | https://doi.org/10.1016/j.synthmet.2022.117056 | pt_BR |
| dc.description.abstract1 | Previous reports indicate that cove-type graphene nanoribbons (CGNR) may present high intrinsic charge mobility of almost 15,000 cm2/Vs. Still, with experimental estimates varying from 150 to 15,000 cm2/Vs. Typically, theoretical mobilities are obtained from methods such as the Drude-Smith model, which tends to neglect the electron-phonon coupling mechanism, or the Boltzmann transport equation, that considers only acoustic phonons. As such, more thorough approaches are needed. In this work, we simulated charge transport in 4-CGNR by explicitly contemplating the lattice collective behavior. The nanoribbon is simulated by a two-dimensional Su-Schrieffer-Heeger (SSH) tight-binding model with electron-phonon coupling and considering all phonon modes. Results show the rise of two quasiparticles: polaron and bipolaron. We probed their dynamical properties by including the presence of an external electric field. Findings indicate that each carrier has a characteristic transport regime that is deeply related to phonon collision interactions. Model derived mobilities for polarons and bipolarons reach up to 18,000 cm2/Vs and 1500 cm2/Vs, respectively. Furthermore, calculations reveal the carriers to be highly efficient charge transporters, with a field independent low effective mass and notable mobility, delivering a better performance than other narrow GNRs. All presented features place the CGNR as a potential base material of future high-quality organic-based optoelectronic devices. The work also contributes to the theoretical understanding of transport physics in highly confined materials. | pt_BR |
| dc.contributor.affiliation | University of Brasilia, Institute of Physics | pt_BR |
| dc.contributor.affiliation | Technical University of Denmark, Department of Energy Conversion and Storage | pt_BR |
| dc.contributor.affiliation | University of Brasilia, Institute of Physics | pt_BR |
| dc.contributor.affiliation | University of Brasilia, Institute of Physics | pt_BR |
| dc.contributor.affiliation | University of Brasilia, Institute of Physics | pt_BR |
| dc.description.unidade | Instituto de Física (IF) | pt_BR |
| Aparece nas coleções: | Artigos publicados em periódicos e afins
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