Abstract
We have confirmed the existence, as first reported by Kim and Chan, of a supersolid state in solid at temperatures below 250 mK. We have employed a torsional oscillator cell with a square cross section to insure a locking of the solid to the oscillating cell. We find that the nonclassical rotational inertia signal is not a universal property of solid but can be eliminated through an annealing of the solid helium sample. This result has important implications for our understanding of the supersolid state.
- Received 19 April 2006
DOI:https://doi.org/10.1103/PhysRevLett.97.165301
©2006 American Physical Society