Ruutu, J. P.; Hakonen, P. J.; Babkin, A. V.; Parshin, A. Ya.; Penttilä, J. S. ; Saramäki, J. P.; Tvalashvili, G. Facet growth of 4He crystals at mK temperatures

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We have investigated creation of 4 He crystals from the superfluid phase at the temperature range 2 mK -1.0 K. Statistical nucleation-event distributions in overpressure were found to be broad, asymmetric, and temperature independent below 100 mK. Our statistical analysis agrees with a theoretical model suggesting that solid formation is driven by macroscopical quantum-mechanical fluctuations from a seed preexisting in a cavity on the wall. [S0031-9007(96)

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