Non-linear effects in the cyclotron resonance of a massless quasi-particle in graphene

Details Non-linear effects in the cyclotron resonance of a massless quasi-particle in graphene Non-linear effects in the cyclotron resonance of a massless quasi-particle in graphene

2008-12-04

arxiv.org/abs/0812.0855v1

Phys. Rev. B 79, 241309(R) (2009)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 4 figures

Scientific paper

10.1103/PhysRevB.79.241309

We consider the classical motion of a massless quasi-particle in a magnetic field and under a weak electromagnetic radiation with the frequency $\omega$. Due to the non-parabolic, linear energy dispersion, the particle responds not only at the frequency $\omega$ but generates a broad frequency spectrum around it. The linewidth of the cyclotron resonance turns out to be very broad even in a perfectly pure material which allows one to explain recent experimental data in graphene. It is concluded that the linear response theory does not work in graphene in finite magnetic fields.

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