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.

final version accepted to the special JLTP issue on Supersolid, 16 pages, 6 figures: typos corrected, more explanations given

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Cited by in corpus (3)

• Quantum Plasticity and Supersolid Response in Helium-4
• Dissipative superfluid mass flux through solid 4He
• Giant isochoric compressibility of solid Helium-4: the bistability of superlcimbing dislocations