Exciton effects in armchair graphene nanoribbons |
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Authors: | Y L Jia X Geng H Sun Y Luo |
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Institution: | 1.College of Physics and Electronic Engineering,Xinyang Normal University,Xinyang,P.R. China |
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Abstract: | We have studied the exciton effects in armchair graphene nanoribbons systematically,
using the nonorthogonal tight-binding model supplement by the long-range Coulomb
interactions. It is found from our calculations that the excitation energies, the exciton
binding energies and the exciton wave function sizes of
the E
11 and E
22 excitons all
exhibit oscillation as a function of the ribbon width. And there is a phase shift
of π between the oscillation of the E
11
and E
22 excitons. |
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Keywords: | |
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