Thermal History of Solid 4He Under Oscillation

Abstract

We have studied the thermal history of the resonant frequency of a torsional oscillator containing solid 4He. We find that the magnitude of the frequency shift that occurs below 100 mK is multivalued in the low temperature limit, with the exact value depending on how the state is prepared. This result can be qualitatively explained in terms of the motion and pinning of quantized vortices within the sample. Several aspects of the data are also consistent with the response of dislocation lines to oscillating stress fields imposed on the solid.

7 pages, 6 figures

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• Solid 4He and the Supersolid Phase: from Theoretical Speculation to the Discovery of a New State of Matter? A Review of the Past and Present Status of Research
• Non-linear Elastic Response in Solid Helium: critical velocity or strain
• Torsional oscillator and synchrotron x-ray experiments on solid 4He in aerogel
• Binding of a 3He impurity to a screw dislocation in solid 4He
• ${}^4$He Crystal Quality and Rotational Response in a Transparent Torsional Oscillator
• Low frequency acoustics in solid ${}^4$He at low temperature
• Supersolid behavior in confined geometry
• The low temperature elastic anomalies in solid helium
• Non-Classical Response from Quench-Cooled Solid Helium Confined in Porous Gold
• Frequency-dependent Study of Solid Helium-4 Contained in a Rigid Double-torus Torsional Oscillator
• The glassy response of double torsion oscillators in solid Helium-4
• In Pursuit of the Elusive Supersolid
• Characterization of the Surface of Moving solid 4He
• Hydrodynamics of superfluids confined in blocked rings and wedges
• Influence of Ortho-H2 Clusters on the Mechanical Properties of Solid Para-H2
• Saga of Superfluid Solids
• Quantized vortex state in hcp solid 4He