Abstract
The intrinsic transverse-magnetic modes of graphene with spatial dispersion are investigated theoretically in the hydrodynamic regime in a terahertz frequency range. It is revealed that spatial dispersion is caused by the diffusion electron-transport mechanism due to the spreading of electron-concentration gradients under the effect of pressure in an electron liquid. The cases of a screened and unscreened plasmon as well as electron sound are considered.
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Funding
This work was performed in the framework of the state task and supported in part by the Russian Foundation for Basic Research, project no. 18-37-20004, and “BAZIS” fund.
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Translated by N. Korovin
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Fateev, D.V., Popov, V.V. Hydrodynamic Terahertz Plasmons and Electron Sound in Graphene with Spatial Dispersion. Semiconductors 54, 941–945 (2020). https://doi.org/10.1134/S1063782620080084
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DOI: https://doi.org/10.1134/S1063782620080084