Journal of Physical Studies 12(4), Article 4702 [4 pages] (2008) DOI: https://doi.org/10.30970/jps.12.4702 THE PLASMA OSCILLATIONS IN A TWO-DIMENSIONAL ELECTRON-HOLE LIQUID S. A. Moskalenko1, M. A. Liberman2, E. V. Dumanov1, A. G. Stefan1, M. I. Shmiglyuk1 1Institute of Applied Physics of the Academy of Sciences of Moldova, Academic St. 5, Chisinau, MD2028, Republic of Moldova 2Department of Physics, Uppsala University, Box 530, SE-751 21, Uppsala, Sweden

The plasma oscillations of the two-dimensional electron-hole system in the presence of a strong perpendicular magnetic field are studied. Only the intra-Landau level excitations are taken into account when the electrons and holes are situated on their lowest Landau levels, the filling factor $v^2$ being less than 1. The ground state of the two-dimensional e-h system is supposed to be the electron-hole liquid. The dispersion relations for the optical and acoustical plasmon modes were obtained. The influence of the supplementary in-plane electric field acting side by side with the strong perpendicular magnetic field is discussed.

PACS number(s): 71.35.Lk, 71.35.Ee

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