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arXiv 0911.5671cond-mat.mes-hall
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圆偏振光诱导石墨烯的金属-绝缘体相变

Metal-insulator transition in graphene induced by circularly polarized photons

O. V. Kibis

摘要:

得到了描述石墨烯中无质量Dirac费米子与圆偏振光之间强相互作用的电子-光子Dirac方程的精确定态解。由此推论,这种相互作用形成了电子-光子束缚态,这种束缚态应被看作是一种带电准粒子。准粒子的能谱是介电型的,其特征在于在价带和导带之间存在能隙。因此,电子-光子相互作用导致石墨烯中的金属-绝缘体转变。石墨烯暴露于激光产生的圆偏振电磁波中,可以观察到光子引起的稳定能隙以及伴随的效应。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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