Abstract
We have investigated the conductivity of surface state electrons on liquid4He films supported by a quench-condensed thin solid hydrogen substrate. A pronounced dip in the ac-conductivity was observed as the He film thickness reached about 10 layers. This phenomenon was studied at different temperatures (range between 1.6 and 2 K), electron densities from 0.9 to 19×108 cm−2, frequencies between 1 and 100 kHz, and for various amplitudes of the ac driving voltage. Ripplon scattering and a ripplonic polaron are discussed as sources for the conductivity dip.
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Kono, K., Albrecht, U. & Leiderer, P. Surface state electrons on a hydrogen film. 2. Influence of adsorbed helium films. J Low Temp Phys 85, 423–444 (1991). https://doi.org/10.1007/BF00682195
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DOI: https://doi.org/10.1007/BF00682195