Heat capacity peak in solid 4He: Effects of disorder and 3He impurities

Abstract

Heat capacity measurements with significantly improved resolution find the presence of a peak in a solid 4He sample in coexistence with liquid. With improved crystallinity, the peak decreases in height and moves to lower temperature. A hysteretic heat capacity signature consistent with 3He-4He phase separation, not detected in an earlier work is clearly observed.

14 pages, 3 figures

References in corpus (9)

• Disorder and the Supersolid State of Solid ${}^4$He
• Oscillation Frequency Dependence of Non-Classical Rotation Inertia of Solid ${}^4$He
• Ring exchanges and the supersolid phase of 4He
• Observation of non-classical rotational inertia in bulk solid 4He
• Annealing Effect for Supersolid Fraction in ${}^4$He
• Nonclassical Rotational Inertia in Single Crystal Helium
• The effect of 3He impurities on the nonclassical response to oscillation of solid 4He
• Melting curve of ${}^4$He: no sign of the supersolid transition down to 10 mK
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Cited by in corpus (3)

• Non-linear Elastic Response in Solid Helium: critical velocity or strain
• A glassy contribution to the heat capacity of hcp ${}^4$He solids
• Holographic Supersolids