Europhys. Lett.
Volume 69, Number 4, February 2005
Page(s) 623 - 628
Section Condensed matter: electronic structure, electrical, magnetic, and optical properties
Published online 14 January 2005
Europhys. Lett., 69 (4), pp. 623-628 (2005)
DOI: 10.1209/epl/i2004-10371-6

A new magnetoplasmon sound wave in a two-dimensional electron gas under electromagnetic radiation

C. Zhang and S. Hessami Pilehrood

School of Engineering Physics and Institute of Superconducting and Electronic Materials University of Wollongong - New South Wales 2522, Australia

received 19 August 2004; accepted in final form 1 December 2004
published online 14 January 2005

We report a new magnetoplasmon mode and a sound-like collective excitation in two-dimensional electronic systems under a weak magnetic field and a low-frequency electromagnetic radiation. The analysis is based on the exact time-dependent wave functions and the exact relation between response function with and without radiation. The new mode discovered here can be used as a generating mechanism of high-frequency radiation from a system whose characteristic energy is low.

77.22.Ch - Permittivity (dielectric function).
78.20.Bh - Theory, models, and numerical simulation.
78.30.Fs - III-V and II-VI semiconductors.

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