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

References in corpus (11)

• Low Temperature Shear Modulus Changes in Solid 4-He and Connection to Supersolidity
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Cited by in corpus (5)

• Evidence for a Superglass State in Solid 4He
• Probing the Upper Limit of Nonclassical Rotational Inertia
• 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
• Torsional oscillator and synchrotron x-ray experiments on solid 4He in aerogel
• Binding of a 3He impurity to a screw dislocation in solid 4He