Abstract
We report an instability of 4He crystal surface during a large modification of its shape observed by schlieren photography. 4He crystal was nucleated on an ultrasound transducer which was placed in the upper part of the sample cell facing the bottom. The crystal was grown on the transducer and the lowest part of it eventually touched the bottom of the cell. Almost immediately, the crystal started to change shape very quickly to adjust itself to the new boundary condition. During this large deformation, the hexagonal shape of the crystal surrounded by facets became unstable and the surface became corrugated. The corrugation pattern during the deformation was observed by a high-speed camera. The results were compared with Kelvin-Helmholtz type instability which Uwaha and Nozières predicted.
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Abe, H., Morikawa, M., Ueda, T. et al. Instability of the Solid-Liquid Interface of 4He during a Large Transformation. J Low Temp Phys 150, 289–294 (2008). https://doi.org/10.1007/s10909-007-9553-0
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DOI: https://doi.org/10.1007/s10909-007-9553-0