Transporte e estados confinados de portadores de carga em nanoestruturas de grafeno / Transport and Confined States of charge carriers in Graphene Nanostructures

AUTOR(ES)
FONTE

IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia

DATA DE PUBLICAÇÃO

22/02/2010

RESUMO

In this work we investigate the behavior of charge carriers in a graphene sheet subjected to a one-dimensional electrostatic potential U(x). At first we consider two coupled quantum wells potential. For this structure we calculate the energy spectrum for the bound states, as well as the probability density behavior for some particular states. Some results for the electronic transmission coefficient through these structures are also presented. Next, we consider the electrostatic potential as a mutibarrier structure and then a correlated disorder was introduced in the barrier width. For this system, the transmission of these carriers through this potential as well as the conductance are investigated for different disorder strengths. Finally a quasiperiodic supperlattice that follows the Fibonacci serie was taken into account and the results for transmission were also presented for this structure.

ASSUNTO(S)

estruturas eletronicas e propriedades eletricas de superficies interfaces e peliculas grafeno nanociÃncia transporte graphene nanoscience transport

ACESSO AO ARTIGO

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