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arXiv · 0910.2163

Inter-valley plasmons in graphene

Timur Tudorovskiy·Sergey A. Mikhailov
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Abstract

The spectrum of two-dimensional (2D) plasma waves in graphene has been recently studied in the Dirac fermion model. We take into account the whole dispersion relation for graphene electrons in the tight binding approximation and the local field effects in the electrodynamic response. Near the wavevectors close to the corners of the hexagon-shaped Brillouin zone we found new low-frequency 2D plasmon modes with a linear spectrum. These "inter-valley" plasmon modes are related to the transitions between the two nearest Dirac cones.

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Timur Tudorovskiy, Sergey A. Mikhailov. 2009-10-12. Inter-valley plasmons in graphene. https://doi.org/10.1103/physrevb.82.073411

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