Nonclassical Rotational Inertia in Single Crystal Helium

Details Nonclassical Rotational Inertia in Single Crystal Helium Nonclassical Rotational Inertia in Single Crystal Helium

2007-06-06

arxiv.org/abs/0706.0906v2

Physics

Condensed Matter

Other Condensed Matter

4 figures

Scientific paper

10.1103/PhysRevLett.99.135302

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 carried out new torsional oscillator measurements on large helium crystals grown under constant temperature and pressure. We observe NCRI in all samples, indicating that the phenomenon cannot be explained by a superfluid film flowing along grain boundaries.

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