Fizika Nizkikh Temperatur: Volume 46, Number 10 (October 2020), p. 1171-1181 ( to contents , go back )
Structure and collective oscillations of electron systems consisting of several chains
V. E. Syvokon, E. S. Sokolova, and S. S. Sokolov
B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine Kharkiv 61103, Ukraine
Received May 25, 2020, published online August 21, 2020
The study of the collective properties of systems of surface electrons consisting of several charge lines has been carried out. Under simulation of the system, using Fourier analysis of the average coordinates of the particles along and across the lines, the characteristic vibration frequencies in the system are found. The frequencies are compared with theoretically obtained laws of the dispersion of plasma modes, calculated by the method of equations of motion for small displacements of electrons from the equilibrium position. The dispersion laws of collective vibrations were calculated for two-, three-, and four-chain electron systems, and in the latter case, configurations with both the same and different distances between the charge lines were considered. There is good agreement between the results of the simulation method and the frequencies following from the dispersion laws.
Key words: dispersion of plasma oscillations, low-dimensional electronic systems, surface electrons.