Spectrum of collective vibrations of a one-dimensional system of electrons over liquid helium
S. S. SokolovB. I. Verkin Physicotechnical Institute of Low Temperatures, Ukrainian Academy of Sciences, 310164 KharkovO. I. KirichekB. I. Verkin Physicotechnical Institute of Low Temperatures, Ukrainian Academy of Sciences, 310164 Kharkov
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The dispersion relation for collective modes of a one-dimensional chain of electrons in a channel filled with liquid helium is studied theoretically. It is shown that the dispersion relation has two branches, including an optical branch with a threshold frequency that depends on the magnitude of the compressing electric field. A dispersion relation is obtained for modes in the presence of a magnetic field applied parallel to the compressing field.
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