Banca de DEFESA: Jailson Gomes da Silva

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : Jailson Gomes da Silva
DATE: 17/10/2022
TIME: 14:30
LOCAL: On-line
TITLE:

DYNAMICS OF CHARGES IN SILICENE NANORIBBONS

KEY WORDS:

Key-words: Silicene. Charge average density. Polaron. Electron-phononn coupling. Armchair silicene nanoribbons.

PAGES: 78
BIG AREA: Ciências Exatas e da Terra
AREA: Física
SUMMARY:

In this work we report the effects of electron-phonon coupling on the density distribution of charges in silicene nanoribbons by the using the extended tight-binding model with lattice relaxation. The results show that the charge distribution on the silicon nanoribbons is analogous to that of graphene and that the charge location increases when the intensity of the electron-phonon coupling also increases. We also show that silicon nanoribbons can be a conductive or semiconducting material, depending on the width of the nanoribbons. We evaluated the kinematic behavior of the charge center associated with the polaron for different electric field strengths implemented in the system in an adiabatic way. We considered three values of electron-phonon coupling in order to verify the degree of charge stability along the length nanoribbons. In this way, we show that fluctuations in the values of the average polaron velocities occur as the quasi-particle velocity approaches a saturation value. We verified that the average density of charge distribution is strongly modified due to the presence of a more intense electric field. We also verified that electron-phonon coupling is a fundamental parameter in the description of polaron transport in armchair silicene nanoribbons, since it significantly alters the time in which the charge disperses along the lattice. In addition to contributing intensely to the increase or reduction in the average speed of charge carriers in armchair silicene nanoribbons, system of the great nanoscientific and nanotechnological interest.

BANKING MEMBERS:
Externo à Instituição - ANTONIO LUCIANO DE ALMEIDA FONSECA
Externo ao Programa - 1705218 - BERNHARD GEORG ENDERS NETO
Interno - 407633 - DAVID LIMA AZEVEDO
Externo ao Programa - 1804140 - FABIO FERREIRA MONTEIRO
Externo à Instituição - GESIEL GOMES SILVA - IFGO