Superfluidity of isotopically doped parahydrogen clusters

Journal Article · Wed Aug 15 00:00:00 EDT 2007 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.76.021201· OSTI ID:21011357

Mezzacapo, Fabio; Boninsegni, Massimo ^[1]

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1. Department of Physics, University of Alberta, Edmonton, Alberta, T6G 2G7 (Canada)

It is shown by computer simulations that superfluid parahydrogen clusters of more than 22 molecules can be turned insulating and 'solidlike' by the replacement of as few as one or two molecules, with ones of the heavier orthodeuterium isotope. A much smaller effect is observed with substitutional orthohydrogen. Substitutional orthodeuterium molecules prevalently sit in the inner part of the cluster, whereas orthohydrogen impurities reside primarily in the outer shell, near the surface. Implications on the superfluidity of pure parahydrogen clusters are discussed.

• OSTI ID: 21011357
• Journal Information: Physical Review. A, Vol. 76, Issue 2; Other Information: DOI: 10.1103/PhysRevA.76.021201; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ATOMIC CLUSTERS
COMPUTERIZED SIMULATION
DEUTERIUM
DOPED MATERIALS
HYDROGEN
IMPURITIES
MOLECULES
SUPERFLUIDITY
SURFACES