Surface electron mobility in helium under strong electron–electron interaction

Abstract

Experimental results on the electron mobility over liquid helium surface in the temperature region of 0.5–1.3 K, with a charge concentration ns = (2.8–12)·108 cm−2 and a frequency ω = 324 MHz of the driving electric field are reported. These results are compared with theoretical values of electron mobility calculated for different limiting cases relative to electron–electron collision frequency. It is shown that the complete control approximation, when the electron–electron collision frequency is much higher than the electron momentum relaxation frequency, successfully describes the kinetic properties of surface electrons in the region of concentrations exceeding 4·108 cm −2.

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DOI

10.1063/10.0032655

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