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Pinning effects in a two-dimensional cluster glass | | Wenlong Wang
; Rogelio Díaz-Méndez
; Mats Wallin
; Jack Lidmar
; Egor Babaev
; | | Date: |
3 Nov 2020 | | Abstract: | We study numerically the glass formation and depinning transition of a system
of two-dimensional cluster-forming monodisperse particles in presence of
pinning disorder. The pairwise interaction potential is nonmonotonic, and is
motivated by the intervortex forces in type-$1.5$ superconductors. Such systems
can form cluster glasses due to the intervortex interactions following a
thermal quench, without underlying disorder. We study the effects of vortex
pinning in these systems. We find that a small density of pinning centers of
moderate depth has limited effect on vortex glass formation, i.e., formation of
vortex glasses is dominated by intervortex interactions. At higher densities
pinning can significantly affect glass formation. The cluster glass depinning,
under a constant driving force, is found to be plastic, with features distinct
from non-cluster-forming systems such as clusters merging and breaking. We find
that in general vortices with cluster-forming interaction forces can exhibit
stronger pinning effects than regular vortices. | | Source: | arXiv, 2011.01664 | | Services: | Forum | Review | PDF | Favorites | |
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