Frequency Dependence of the Supersolid Signature in Polycrystalline 4He

2013/11/13 by George Nichols, Malcolm Poole, Nichols, George +10
Earth and Planetary Sciences · Materials Science · Physics and Astronomy · #FOS: Physical sciences #High-pressure geophysics and materials #Material Dynamics and Properties #Other Condensed Matter (cond-mat.other) #Quantum, superfluid, helium dynamics #cond-mat.other

paper · pdf · doi:10.48550/arxiv.1311.3110

8 pages, 6 figures (including Supplemental Information)

openalex publication_date 2013/11/13 · arxiv created 2014/09/21 · arxiv updated 2014/09/23 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We report studies, using a two mode torsional oscillator, of the putative supersolid signature in polycrystalline 4He. Measurements at two frequencies enable us to eliminate the viscoelastic contribution to the signature, and other instrumental effects arising from the temperature dependent shear modulus of the sample. The complex response function of the sample, encoded via its effective moment of inertia, shows an unexpected and unexplained frequency dependence. This cannot be accounted for by glassy dynamics within the sample. The results do not rule out the possibility of supersolidity in bulk solid 4He. ?

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