A.A. Zabolotnykh - Interne Researcher, Kotelnikov Institute of Radio Engineering and Electronics of the RAS (Moscow) E-mail: zabolotnyh_andre@mail.ru V.A. Volkov - Dr.Sc. (Phys.-Math.), Chief Research Scientist, Kotelnikov Institute of Radio Engineering and Electronics of the RAS (Moscow)

We investigate the effect of electromagnetic retardation on the spectrum of plasmons in dissipative two-dimensional (2D) electron system placed in perpendicular constant magnetic field. We find the spectra are strongly depend on relation σ0/c and magnetic field; here σ0 is the static conductivity of 2D system in the absence of magnetic field (σ0 has velocity dimensionality if the Gaussian units), c is the speed of light. We also find that there is the range of the parameters, at which additional branch in plasmon-polariton spectrum appears. This new branch has abnormally low damping rate.

 

1. Falko V.I., KHmelnickijj D.E. CHto, esli dvumernaja provodimost bolshe skorosti sveta - // ZHEHTF. 1989. T. 95. S. 1988-1992.
2. Govorov A.O., CHaplik A.V. EHffekty zapazdyvanija v processakh relaksacii dvumernojj ehlektronnojj plazmy // ZHEHTF. 1989. T. 95. S. 1976-1979.
3. Chiu K.W., Quinn J.J. Plasma oscillations of a two-dimensional electron gas in a strong magnetic field //  Phys. Rev. B. 1974. V. 9. P. 4724-4732.
4. Volkov V.A., Zabolotnykh A.A. Undamped relativistic magnetoplasmons in lossy two-dimensional electron systems // Phys. Rev. B. 2016. V. 94. P. 165408.