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arXiv · 1801.03129

Phases of superclimbing dislocation with long-range interaction between jogs

Longxiang Liu·Anatoly Kuklov
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Abstract

The main candidate for the superfluid pathways in solid Helium-4 are dislocations with Burgers vector along the hcp symmetry axis. Here we focus on quantum behavior of a generic edge dislocation which can perform superclimb -- climb supported by the superflow along its core. The role of the long range elastic interactions between jogs is addressed by Monte Carlo simulations. It is found that such interactions do not change qualitatively the phase diagram found without accounting for such forces. Their main effect consists of renormalizing the effective scale determining compressibility of the dislocation in the Tomonaga-Luttinger Liquid phase. It is also found that the quantum rough phase of the dislocation can be well described within the gaussian approximation which features off-diagonal long range order in 1D for the superfluid order parameter along the core.

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Longxiang Liu, Anatoly Kuklov. 2018-01-09. Phases of superclimbing dislocation with long-range interaction between jogs. https://doi.org/10.1103/physrevb.97.104510

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