Metal-insulator transition in graphene induced by circularly polarized photons

Article

关键词: TERAHERTZ;    QUANTUM;   

DOI  :  10.1103/PhysRevB.81.165433

来源: SCIE

【 摘 要 】

Exact stationary solutions of the electron-photon Dirac equation are obtained to describe the strong interaction between massless Dirac fermions in graphene and circularly polarized photons. It follows from them that this interaction forms bound electron-photon states which should be considered as a kind of charged quasiparticles. The energy spectrum of the quasiparticles is of dielectric type and characterized by an energy gap between the valence and conductivity bands. Therefore the electron-photon interaction results in metal-insulator transition in graphene. The stationary energy gap, induced by photons, and concomitant effects can be observed for graphene exposed to a laser-generated circularly polarized electromagnetic wave.

【 授权许可】

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