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arXiv · 1509.00339

Drift-induced modifications to the dynamical polarization of graphene

Mohsen Sabbaghi·Hyun-Woo Lee·Tobias Stauber·Kwang Soo Kim
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Abstract

The response function of graphene is calculated in the presence of a constant current across the sample. For small drift velocities and finite chemical potential, analytic expressions are obtained and consequences on the plasmonic excitations are discussed. For general drift velocities and zero chemical potential, numerical results are presented and a plasmon gain region is identified which is related to interband transitions.

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Mohsen Sabbaghi, Hyun-Woo Lee, Tobias Stauber, Kwang Soo Kim. 2015-12-10. Drift-induced modifications to the dynamical polarization of graphene. https://doi.org/10.1103/physrevb.92.195429

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