Abstract
It has been recently proposed that3He bound states may exist in the first non solid layer of liquid helium near a substrate [N. Pavloff and J. Treiner, J. Low Temp. Phys.83, 331 (1991)]. Detailed calculations show that for weak binding substrates on which helium remains liquid, the energy of this substrate state ε3 is in the range −4 to −5.5 K, whereas for stronger substrates on which one or two layers solidify, εs is larger than the energy of a3He atom in bulk4He (−2.8 K). As a special case, we find that3He atoms can be bound at the4He solid-liquid interface, with a binding energy of ≈3 K with respect to bulk. Experiments able to test these predictions are proposed.
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Treiner, J. Helium mixtures on weak binding substrates. J Low Temp Phys 92, 1–9 (1993). https://doi.org/10.1007/BF00681869
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DOI: https://doi.org/10.1007/BF00681869