Features of the transport of quasi-one-dimensional surface electrons in dense gaseous helium

Abstract

The results of an experimental investigation of the mobility of surface electrons localized in quasi-two-dimensional conducting channels in liquid helium on a profiled substrate are presented. The electron mobility is measured in a temperature region corresponding to scattering of particles on helium atoms in the vapor phase. It is shown that with increasing temperature the mobility decreases monotonically in proportion to the change in helium vapor density, then suffers a sharp drop that the authors attribute to the possible formation of a surface anion—electron polaron formation in the dense helium vapor. The results are in agreement with the results on the mobility of two-dimensional and three-dimensional electron systems in helium vapor.