Phys. Rev. Lett. 100, 145301 (2008) [4 pages]Local Superfluidity of Parahydrogen ClustersReceived 12 November 2007; revised 23 January 2008; published 8 April 2008 We study by quantum Monte Carlo simulations the local superfluid response of small (up to 27 molecules) parahydrogen clusters, down to temperatures as low as 0.05 K. We show that at low temperature superfluidity is not confined at the surface of the clusters, as recently claimed by Khairallah et al. [ Phys. Rev. Lett. 98 183401 (2007)]. Rather, even clusters with a pronounced shell structure are essentially uniformly superfluid. Superfluidity occurs as a result of long exchange cycles involving all molecules. © 2008 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.100.145301
DOI:
10.1103/PhysRevLett.100.145301
PACS:
67.90.+z, 61.25.Em
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