A molecular superfluid: non-classical rotations in doped para-hydrogen clusters

Details A molecular superfluid: non-classical rotations in doped para-hydrogen clusters A molecular superfluid: non-classical rotations in doped para-hydrogen clusters

2010-09-23

arxiv.org/abs/1009.4734v1

Phys. Rev. Lett. 105, 133401 (2010)

Physics

Atomic and Molecular Clusters

Scientific paper

10.1103/PhysRevLett.105.133401

Clusters of para-hydrogen (pH2) have been predicted to exhibit superfluid behavior, but direct observation of this phenomenon has been elusive. Combining experiments and theoretical simulations, we have determined the size evolution of the superfluid response of pH2 clusters doped with carbon dioxide (CO2). Reduction of the effective inertia is observed when the dopant is surrounded by the pH2 solvent. This marks the onset of molecular superfluidity in pH2. The fractional occupation of solvation rings around CO2 correlates with enhanced superfluid response for certain cluster sizes.

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