Abstract
Path-integral Monte Carlo calculations have been performed to study superfluid behavior of small para-H2 clusters doped by a single impurity molecule of ortho-D2 at a low temperature of 1.6 K. It is found that the D2 molecule is located near the center of mass of the cluster and H2 molecules are distributed around the D2 molecule to form a shell structure. All the clusters considered here show significant superfluid fractions at this temperature but superfluidity is found to be noticeably quenched at specific sizes of the clusters. The different superfluid propensity depending on the cluster size is understood to be related to the magic number behavior of the para-H2 clusters.
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Choo, J., Kwon, Y. Magic Number Stabilities of Small para-H2 Clusters Doped by a Single ortho-D2 . J Low Temp Phys 150, 358–363 (2008). https://doi.org/10.1007/s10909-007-9557-9
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DOI: https://doi.org/10.1007/s10909-007-9557-9