Superclimbing dislocation with a Coulomb-type interaction between jogs

Autor:	Longxiang Liu, Anatoly Kuklov
Rok vydání:	2018
Předmět:	Condensed Matter::Quantum Gases Physics Condensed matter physics Monte Carlo method 01 natural sciences Symmetry (physics) 010305 fluids & plasmas Superfluidity 0103 physical sciences Coulomb Climb Dislocation 010306 general physics Burgers vector Phase diagram
Zdroj:	Physical Review B. 97
ISSN:	2469-9969 2469-9950
DOI:	10.1103/physrevb.97.104510
Popis:	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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::996fb7b2b122e259b9bca7f0afd9bf58 https://doi.org/10.1103/physrevb.97.104510 Zobrazit plný text záznamu