Tunnelling defect nanoclusters in hcp 4He crystals: alternative to supersolidity

Abstract

A simple model based on the concept of resonant tunnelling clusters of lattice defects is used to explain the low temperature anomalies of hcp 4He crystals (mass decoupling from a torsional oscillator, shear modulus anomaly, dissipation peaks, heat capacity peak). Mass decoupling is a result of an internal Josephson effect: mass supercurrent inside phase coherent tunnelling clusters. Quantitative results are in reasonable agreement with experiments.

13 pages, 5 figures

References in corpus (7)

• Low Temperature Shear Modulus Changes in Solid 4-He and Connection to Supersolidity
• Disorder and the Supersolid State of Solid ${}^4$He
• Oscillation Frequency Dependence of Non-Classical Rotation Inertia of Solid ${}^4$He
• Supersolid Helium at High Pressure
• Probing the Upper Limit of Nonclassical Rotational Inertia
• Heat capacity peak in solid 4He: Effects of disorder and 3He impurities
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Cited by in corpus (2)

• Identifying strongly correlated supersolid states on the optical lattice by quench-induced π-states
• Saga of Superfluid Solids