Abstract
We measured the mechanical response of 3He and 4He bilayer films on a 2D mesoporous Hectorite from 0.1 K to 4 K using 10MHz ultrasound. Below a certain coverage, we observed the slippage of nonsuperfluid films at low temperatures. This behavior was well described by a film-substrate frictional force with a thermally activated process. Furthermore, we found that this slippage is inhibited by the appearance of the fluid state on the “inert” layer.
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Hieda, M., Nishino, T., Suzuki, M. et al. Mechanical Response Properties of He Bilayer Films on an Oscillating Hectorite. Journal of Low Temperature Physics 121, 507–512 (2000). https://doi.org/10.1023/A:1017534704665
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DOI: https://doi.org/10.1023/A:1017534704665