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Absence of low temperature anomaly in the Debye-Waller factor of solid He-4

E. Blackburn·J. M. Goodkind·S. K. Sinha·J. Hudis·C. Broholm·J. van Duijn·C. D. Frost·O. Kirichek·R. B. E. Down
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Abstract

The mean square atomic displacement in hcp-phase solid He-4 has been measured in crystals with a molar volume of 21.3 cm^3. It is temperature independent from 1 K to 140 mK, with no evidence for an anomaly in the vicinity of the proposed supersolid transition. The mean square displacement is different for in-plane motions (0.122 +/- 0.001 A^(2)) and out-of-plane motions (0.150 +/- 0.001 A ^(2)).

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E. Blackburn, J. M. Goodkind, S. K. Sinha, J. Hudis, C. Broholm, J. van Duijn, C. D. Frost, O. Kirichek, R. B. E. Down. 2007-08-01. Absence of low temperature anomaly in the Debye-Waller factor of solid He-4. https://doi.org/10.1103/physrevb.76.024523

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