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Semiconductor Physics, Quantum Electronics & Optoelectronics. 2005. V. 8, N 2. P. 032-036.
Screening effects through electron-electron interaction
in the crystal structures of an intermediate dimension
Ivan Franko Lviv National University, Department of Electronics
50, Dragomanova str., 29005 Lviv, Ukraine
E-mail: tose@polynet.lviv.ua
Abstract. In the paper studied are polarization properties of an electron subsystem in the
structures of intermediate dimension, particularly, in the quasi-two-dimensional structures
depending on the degree of quasi-two-dimensionality. These investigations were founded
on the model dispersion law that most completely governs the peculiarities of the structure.
Here, we studied the character of alternating oscillations of the potential screened by
interelectron interaction, namely, by its anisotropy depending on microscopic parameters
that determine the shape of isoenergetic surface and the degree of quasi-twodimensionality. It is shown that the obtained potential, in comparison with similar results
for isotropic Fermi gas, oscillates at smaller distances with amplitude of an order of
magnitude higher and with a period of an order of that smaller.
Keywords: quasi-two-dimensional structure, interelectron interaction, polarization
properties, singuliarity points.
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