Low-temperature shear modulus changes in solid 4He and connection to supersolidity

James Day and John Beamish ()
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James Day: University of Alberta, Edmonton, Alberta, T6G 2G7 Canada
John Beamish: University of Alberta, Edmonton, Alberta, T6G 2G7 Canada

Nature, 2007, vol. 450, issue 7171, 853-856

Abstract: Evidence for 'supersolidity' has been found in 4He from torsional oscillator measurements that suggest some of the solid decouples at low temperatures. Other signatures of superflow have not been seen, but there may be clues in the solid's mechanical behaviour. This study finds large increases in the shear modulus of solid 4He at low temperatures that appear closely related to the decoupling seen in the torsional oscillator experiments.

Date: 2007
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DOI: 10.1038/nature06383

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