Enhancement of mobilities in a pinned multidomain crystal

Details Enhancement of mobilities in a pinned multidomain crystal Enhancement of mobilities in a pinned multidomain crystal

2006-11-22

arxiv.org/abs/cond-mat/0611582v2

Phys. Rev. B 75, 224103 (2007)

Physics

Condensed Matter

Superconductivity

7 pages, 10 figures Version 2 : longer version

Scientific paper

10.1103/PhysRevB.75.224103

Mobility properties inside and around degenerate domains of an elastic lattice partially pinned on a square array of traps are explored by means of a fully controllable model system of macroscopic particles. We focus on the different configurations obtained for filling ratios equal to 1 or 2 when the pinning strength is lowered. These theoretically expected but never observed configurations are degenerated, which implies the existence of a multidomain crystal. We show that the distinction between trapped and untrapped particles that is made in the case of strong pinning is not relevant for such a weaker pinning. Indeed, one ought to distinguish between particles inside or around the domains associated to positional degeneracies. The possible consequences on the depinning dynamics of the lattice are discussed.

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