Interplay of non-linear elasticity and dislocation-induced superfluidity in solid Helium-4
Abstract
The mechanism of the roughening induced partial depinning of gliding dislocations from Helium-3 impurities is proposed as an alternative to the standard "boiling off". We give a strong argument that Helium-3 remains bound to dislocations even at large temperatures due to very long equilibration times. A scenario leading to the similarity between elastic and superfluid responses of solid Helium-4 is also discussed. Its main ingredient is a strong suppression of the superfluidity along dislocation cores by dislocation kinks (D. Aleinikava, et. al., arXiv:0812.0983). These kinks, on one hand, determine the temperature and Helium-3 dependencies of the generalized shear modulus and, on the other hand, control the superfluid response. Several proposals for theoretical and experimental studies of solid Helium-4 are suggested.
Keywords
Cite
@article{arxiv.1110.5884,
title = {Interplay of non-linear elasticity and dislocation-induced superfluidity in solid Helium-4},
author = {Darya Aleinikava and Anatoly Kuklov},
journal= {arXiv preprint arXiv:1110.5884},
year = {2015}
}
Comments
final version accepted to the special JLTP issue on Supersolid, 16 pages, 6 figures: typos corrected, more explanations given