Nonsuperfluid origin of the nonclassical rotational inertia in a bulk sample of solid 4He

The torsional oscillator experiments described here examine the effect of disorder on the nonclassical rotational inertia (NCRI) of a solid 4He sample. The NCRI increases with increasing disorder, but the period changes responsible for this increase occur primarily at higher temperatures. Contrary t...

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Bibliographic Details
Published in:Physical review letters 2010-06, Vol.104 (25), p.255301-255301
Main Author: Reppy, John D
Format: Article
Language:English
Online Access:Get full text
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Summary:The torsional oscillator experiments described here examine the effect of disorder on the nonclassical rotational inertia (NCRI) of a solid 4He sample. The NCRI increases with increasing disorder, but the period changes responsible for this increase occur primarily at higher temperatures. Contrary to expectations based on a supersolid scenario, the oscillator period remains relatively unaffected at the lowest temperatures. This result points to a nonsuperfluid origin for the NCRI.
ISSN:1079-7114