Abstract
In a one-dimensional quantum mechanical model the phonon transmission between a solid and liquid He is calculated. It is shown how surface roughness changes the binding forces between the He atoms and the solid and therefore can lead to an increased transmission of low-energy phonons. In addition it turns out that the finite lifetimes of the He states also enhance the transmission probability.
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HILTI AG, FL-9494 Schaan, Liechtenstein.
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Haug, R., Sigmund, E. & Weiss, K. Phonon transmission at a liquid helium-solid interface: The influence of surface roughness and finite lifetimes of the He states. J Low Temp Phys 67, 27–46 (1987). https://doi.org/10.1007/BF01070648
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DOI: https://doi.org/10.1007/BF01070648