Negative dynamic conductivity of a current driven array of graphene nanoribbons

Mikhailov, Sergey A.; Savostianova, Nadja A.; Moskalenko, Andrey S.

Negative dynamic conductivity of a current driven array of graphene nanoribbons

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Datum

2016

Autor:innen

Mikhailov, Sergey A.

Savostianova, Nadja A.

Moskalenko, Andrey S.

Publikationstyp

Zeitschriftenartikel

Publikationsstatus

Published

Erschienen in

Physical Review B. 2016, 94(3), 035439. ISSN 2469-9950. eISSN 2469-9969. Available under: doi: 10.1103/PhysRevB.94.035439

Zusammenfassung

We consider a periodic array of graphene nanoribbons under the action of a strong dc electric field E₀ and an external electromagnetic excitation with the frequency ω and the lateral wave vector q. Solving the quasiclassical Boltzmann kinetic equation and calculating the surface dynamic conductivity σ_2D(q,ω,E₀) and the absorption coefficient of such a system we show that the real part of the conductivity and the absorption coefficient may become negative under certain conditions. Physically this corresponds to the amplification of the electromagnetic waves at the expense of the energy of the direct current source. The results are discussed in connection with experiments on the surface acoustic waves and on the Smith-Purcell-type graphene-based terahertz emitter.

Fachgebiet (DDC)

530 Physik

Zitieren

ISO 690

MIKHAILOV, Sergey A., Nadja A. SAVOSTIANOVA, Andrey S. MOSKALENKO, 2016. Negative dynamic conductivity of a current driven array of graphene nanoribbons. In: Physical Review B. 2016, 94(3), 035439. ISSN 2469-9950. eISSN 2469-9969. Available under: doi: 10.1103/PhysRevB.94.035439

BibTex

@article{Mikhailov2016Negat-36739,
  year={2016},
  doi={10.1103/PhysRevB.94.035439},
  title={Negative dynamic conductivity of a current driven array of graphene nanoribbons},
  number={3},
  volume={94},
  issn={2469-9950},
  journal={Physical Review B},
  author={Mikhailov, Sergey A. and Savostianova, Nadja A. and Moskalenko, Andrey S.},
  note={Article Number: 035439}
}

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