Metal-insulator transition in graphene induced by circularly polarized photons

Details Metal-insulator transition in graphene induced by circularly polarized photons Metal-insulator transition in graphene induced by circularly polarized photons

2009-11-30

arxiv.org/abs/0911.5671v4

Phys. Rev. B 81, 165433 (2010)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 1 figure; published version

Scientific paper

10.1103/PhysRevB.81.165433

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.

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