Anisotropy of growth kinetics of He-3 crystals below 1 mK.

Tsepelin, Viktor and Alles, Harry and Babkin, A. and Jochemsen, Reyer and Parshin, Alexander Y. and Todoshchenko, Igor A. (2002) Anisotropy of growth kinetics of He-3 crystals below 1 mK. Physical review letters, 88 (4). 045302. ISSN 1079-7114

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The growth anisotropy of different facets has been measured in He-3 crystals at 0.55 mK using a low-temperature Fabry-Perot interferometer and high-resolution pressure measurements. The observed linear dependence of the growth velocity on the driving force shows that facets grow due to the presence of dislocations. The values of the obtained step energies suggest that He-3 has stronger coupling of the liquid-solid interface to the lattice than has been expected. The dependence of the step energy versus the step height is consistent with a quartic power law pointing out that the step-step interactions are of elastic origin.

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Journal Article
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Physical review letters
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03 Feb 2009 10:18
Last Modified:
21 Nov 2022 19:11