Disorder-induced quantum properties of solid Helium-4

Abstract

We briefly discuss theoretical and experimental discoveries in the field of supertransport and plasticity in imperfect solid 4 He and argue that these promise new exciting developments. Several experiments aimed at clarifying the origin of the supertransport and its relation to plasticity are proposed. In particular, we argue that "cold-working" protocols of sample preparation should be crucial in this respect.

Saga of Superfluid Solids

“…This compressibility is found to be comparable to that of liquid 4 He, despite the fact that in an ideal solid it is essentially zero. In the syringe regime crystal growth is possible by the mechanism of dislocation superclimb when edge dislocations add atoms to atomic layers provided there is superfluid atomic transport along their cores [143][144][145][146][147].…”