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28 March 2024
 
  » arxiv » 1309.2659

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Strongly anisotropic Dirac quasiparticles in irradiated graphene
S.V. Syzranov ; Ya.I. Rodionov ; K.I. Kugel ; F. Nori ;
Date 10 Sep 2013
AbstractWe study quasiparticle dynamics in graphene exposed to a linearly-polarized electromagnetic wave of very large intensity. Low-energy transport in such system can be described by an effective time-independent Hamiltonian, characterized by multiple Dirac points in the first Brillouin zone. Around each Dirac point the spectrum is anisotropic: the velocity along the polarization of the radiation significantly exceeds the velocity in the perpendicular direction. Moreover, in some of the points the transverse velocity oscillates as a function of the radiation intensity. We find that the conductance of a graphene p-n junction in the regime of strong irradiation depends on the polarization as $G( heta)propto|sin heta|^{3/2}$, where $ heta$ is the angle between the polarization and the p-n interface, and oscillates as a function of the radiation intensity.
Source arXiv, 1309.2659
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