Abstract
In this paper, we consider the effect of charge carrier drift on plasmon modes (plasmons) in electron Dirac liquid in graphene with a shifted Fermi level. Dispersion relations for plasmons were obtained using an electromagnetic approach and a hydrodynamic description of an electron liquid. Damped and amplified plasmon eigenmodes are studied numerically depending on the relationship of the magnitudes and directions of the direct electric current and the phase velocity of the plasmon.
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