Phys. Rev. Lett. 97, 165301 (2006) [4 pages]Observation of Classical Rotational Inertia and Nonclassical Supersolid Signals in Solid 4He below 250 mKReceived 19 April 2006; revised 15 August 2006; published 20 October 2006 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 the nonclassical rotational inertia 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 our understanding of the supersolid state. © 2006 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.97.165301
DOI:
10.1103/PhysRevLett.97.165301
PACS:
67.80.−s, 67.80.Mg
See AlsoSee Also: I. A. Todoshchenko, H. Alles, J. Bueno, H. J. Junes, A. Ya. Parshin, and V. Tsepelin, Melting Curve of 4He: No Sign of a Supersolid Transition down to 10 mK, Phys. Rev. Lett. 97, 165302 (2006). |
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