Observation of Classical Rotational Inertia and Nonclassical Supersolid Signals in Solid 4He below 250 mK

Details Observation of Classical Rotational Inertia and Nonclassical Supersolid Signals in Solid 4He below 250 mK Observation of Classical Rotational Inertia and Nonclassical Supersolid Signals in Solid 4He below 250 mK

2006-04-22

arxiv.org/abs/cond-mat/0604528v5

Phys. Rev. Lett. 97, 165301 (2006)

Physics

Condensed Matter

Other Condensed Matter

Scientific paper

We have confirmed the existence, as first reported by Kim and Chan, of a supersolid state in solid 4He 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 NCRI signal is not a universal property of solid 4He, but can be eliminated through an annealing of the solid helium sample. This result has important implications for the nature of the supersolid state.

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