Probable heat capacity signature of the supersolid transition

X. Lin, A. C. Clark and M. H. W. Chan ()
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X. Lin: The Pennsylvania State University, University Park
A. C. Clark: The Pennsylvania State University, University Park
M. H. W. Chan: The Pennsylvania State University, University Park

Nature, 2007, vol. 449, issue 7165, 1025-1028

Abstract: Supersolid signature The apparent observation of supersolid helium in 2004 generated much interest in the physics community, and curiosity outside of it. But the thermodynamic signature expected to accompany the transition was absent. Lin et al. present new evidence on the matter. The phenomenon, which shows similarities to that seen when liquid helium enters the superfluid state, occurs when a fraction of the solid appears to decouple from the motion of the surrounding lattice. The new experiment reveals a heat capacity peak coincident with the onset of mass decoupling, which supports the existence of a genuine transition between the normal solid and supersolid phases of 4He.

Date: 2007
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DOI: 10.1038/nature06228

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