Low-temperature anomalies of 4He crystals |
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Authors: | A. F. Andreev |
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Affiliation: | 1.Kapitza Institute for Physical Problems,Russian Academy of Sciences,Moscow,Russia |
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Abstract: | Low-temperature anomalies of hcp 4He crystals (mass decoupling from a torsional oscillator, shear modulus anomaly, dissipation peaks, and heat capacity peak) are explained. A simple model based on the concept of resonant tunneling systems in imperfect crystals is proposed. Mass decoupling is caused by an internal Josephson effect: the mass supercurrent inside phase coherent tunneling systems. Quantitative results are in reasonable agreement with experiments. |
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