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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 | Abstract: | We 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 | Services: | Forum | Review | PDF | Favorites |
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