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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Tuning transport properties of graphene three-terminal structures by mechanical deformation

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Autor(es):
Torres, V. [1, 2] ; Faria, D. [3] ; Latge, A. [1]
Número total de Autores: 3
Afiliação do(s) autor(es):
[1] Univ Federa Fluminense, Inst Fis, BR-24210340 Niteroi, RJ - Brazil
[2] Univ Prebiteriana Mackenzie, MackGraphe, BR-01302970 Sao Paulo, SP - Brazil
[3] Univ Estado Rio de Janeiro, Inst Politecn, BR-28625570 Nova Friburgo, RJ - Brazil
Número total de Afiliações: 3
Tipo de documento: Artigo Científico
Fonte: Physical Review B; v. 97, n. 16 APR 23 2018.
Citações Web of Science: 3
Resumo

Straintronic devices made of carbon-based materials have been pushed up due to the graphene high mechanical flexibility and the possibility of interesting changes in transport properties. Properly designed strained systems have been proposed to allow optimized transport responses that can be explored in experimental realizations. In multiterminal systems, comparisons between schemes with different geometries are important to characterize the modifications introduced by mechanical deformations, especially if the deformations are localized at a central part of the system or extended in a large region. Then, in the present analysis, we study the strain effects on the transport properties of triangular and hexagonal graphene flakes, with zigzag and armchair edges, connected to three electronic terminals, formed by semi-infinite graphene nanoribbons. Using the Green's function formalism with circular renormalization schemes, and a single band tight-binding approximation, we find that resonant tunneling transport becomes relevant and is more affected by localized deformations in the hexagonal graphene flakes. Moreover, triangular systems with deformation extended to the leads, like longitudinal three-folded type, are shown as an interesting scenario for building nanoscale waveguides for electronic current. (AU)

Processo FAPESP: 17/12747-4 - Propriedades eletrônicas e óticas (lineares e não lineares) de materiais 2D mecanicamente deformados
Beneficiário:Vanessa Carolina Torres Montilla
Linha de fomento: Bolsas no Brasil - Pós-Doutorado