Manipulation of the Electronic Band Structure of Monolayer MoS2 in Presence of Exchange Field and Off-Resonant Light

doi:10.3969/j.cnki.jdxb.2018.03.008

Abstract

Abstract:

Utilizing the low energy effective Hamilton model from the tight-binding approximation,we have investigated the electronic band structure of the monolayer MoS₂ in the presence of magnetic exchange field and off-resonant circularly polarized light.The obtained results show that,the magnetic exchange field can break and/or modulate the spin degeneracy of the conduction and/or valence bands,and the band gaps around K point of the monolayer MoS₂ increase with the external off-resonant circularly polarized light induced effective energy;while those around K′ increase firstly and then decrease with the light field induced effective energy,realizing the transition of semiconductor-metal-semiconductor.Therefore,the two-dimensional MoS₂ can be tuned to be new bandgap materials with excellent spin and optoelectrical properties.

Key words: MoS₂, magnetic exchange field, off-resonant light, electronic band structure

ZHANG Xincheng,LIAO Wenhu. Manipulation of the Electronic Band Structure of Monolayer MoS₂ in Presence of Exchange Field and Off-Resonant Light[J]. Journal of Jishou University（Natural Sciences Edition), DOI: 10.3969/j.cnki.jdxb.2018.03.008.

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Manipulation of the Electronic Band Structure of Monolayer MoS₂ in Presence of Exchange Field and Off-Resonant Light

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