Thermal History of Solid 4He Under Oscillation

Details Thermal History of Solid 4He Under Oscillation Thermal History of Solid 4He Under Oscillation

2007-11-22

arxiv.org/abs/0711.3619v2

Physics

Condensed Matter

Statistical Mechanics

7 pages, 6 figures

Scientific paper

10.1103/PhysRevB.77.184513

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.

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