Nonclassical rotational inertia in helium crystals

It has been proposed that the observed nonclassical rotational inertia (NCRI) in solid helium results from the superflow of thin liquid films along interconnected grain boundaries within the sample. We have observed NCRI in large (4)He crystals grown at constant temperature and pressure, demonstrati...

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Bibliographic Details
Published in:Physical review letters 2007-09, Vol.99 (13), p.135302-135302, Article 135302
Main Authors: Clark, A C, West, J T, Chan, M H W
Format: Article
Language:English
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Summary:It has been proposed that the observed nonclassical rotational inertia (NCRI) in solid helium results from the superflow of thin liquid films along interconnected grain boundaries within the sample. We have observed NCRI in large (4)He crystals grown at constant temperature and pressure, demonstrating that the superfluid grain boundary model cannot explain the phenomenon.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.99.135302