Circularly Polarized Light on Graphene with Trigonal Warping

Abstract

In this article, we theoretically investigate the electronic band structure of monolayer graphene in the presence of trigonal warping and photo-induced effects. The total Hamiltonian of the system has been written and the optical absorption of circularly polarized light for the high frequency regime have been modelled by the Haldane interaction. The relation between trigonal warp aspects and optical absorption of circularly polarized light has been overviewed through the model. The main aim of this investigation is to assess the effects of trigonal warp and photo induced-effects which show for the high frequency regime that the edge states can be controlled by tuning the amplitude of the light. Additionally, theoretically analyzed the versatile electronic properties of trigonal warped-graphene under circularly polarized light. We conclude that photo-induced effect which induced circularly polarized light leads to the opening of energy gap between valance and conduction bands while raises electron-hole asymmetry in the system. 

Keywords

• Circularly Polarized Light,Graphene,Trigonal Warp

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