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

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

2011-10-19

arxiv.org/abs/1110.4359v1

Physics

Condensed Matter

Other Condensed Matter

13 pages, 5 figures

Scientific paper

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.

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