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Effect of electromagnetic retardation on spectrum of magnetoplasmons in dissipative 2D electron system

Keywords:

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.
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