Search for supersolidity in 4He in low-frequency sound experiments

Details Search for supersolidity in 4He in low-frequency sound experiments Search for supersolidity in 4He in low-frequency sound experiments

2006-07-21

arxiv.org/abs/cond-mat/0607555v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Submitted to the Quantum Fluids and Solids Conf. Aug. 2006 Kyoto

Scientific paper

10.1007/s10909-007-9454-2

We present results of the search for supersolid 4He using low-frequency, low-level mechanical excitation of a solid sample grown and cooled at fixed volume. We have observed low frequency non-linear resonances that constitute anomalous features. These features, which appear below about 0.8 K, are absent in 3He. The frequency, the amplitude at which the nonlinearity sets in, and the upper temperature limit of existence of these resonances depend markedly on the sample history.

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