Observation of Non-Classical Rotational Inertia in Bulk Solid 4He

Classical rotational inertia of solid 4He.

The observation of reduced rotational inertia in a cell containing solid 4He has been interpreted as evidence for superfluidity of the solid. We propose an alternative explanation: slippage of the solid, due to grain boundary premelting between the solid and dense adsorbed layers at the container wall. We calculate the range of film thickness, and determine the viscosity that will account for t...

Observation of Non-classical Rotational Inertia in Solid Helium - an Indication of Superflow in Solids?

The phenomenon of Non-Classical Rotational Inertia, in which a body does not rotate with its rotating container, has been recently observed in solid Helium-4. This property is shared by superfluid liquid helium. The recent findings might be evidence of superflow in solids. Superfluidity or flow sans dissipation is commonly associated with liquids. Counter-intuitive as it may seem, quantum mecha...

Observation of mass transport through solid 4He

Comment on "observation of unusual mass transport in solid hcp 4He".

Observation of thermomechanical equilibration in the presence of a solid 4He conduit