Vortices Freeze like Window Glass: the Vortex Molasses Scenario

Abstract

We overview several recent experimental and numerical observations, which are at odds with the Vortex Glass theory of the freezing of disordered vortex matter. To reinvestigate the issue, we performed numerical simulations of the overdamped London - Langevin model, and use finite size scaling to analyze the data. Upon approaching the transition the initial Vortex Glass type criticality is arrested at some crossover temperature. Below this temperature the timescales continue growing very quickly, consistent with the Vogel-Fulcher form, while the spatial correlation length xi stops exhibiting any observable divergence. We call this mode of freezing the Vortex Molasses scenario.

arXiv comment4 pages, 4 figures

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• Theory of the vortex matter transformations in high Tc superconductor YBCO
• Out-of-equilibrium dynamics of the vortex glass
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• Absence of a True Vortex-Glass Phase above the Bragg Glass Transition Line in Bi-2212
• Amorphous Vortex Glass Phase in Strongly Disordered Superconductors
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• Dynamics of vortex glass phase in strongly type II superconductors
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• "Fragile superconductivity": a kinetic glass transition in the vortex matter of the high-temperature superconductor YBa2Cu3O7-d
• First-order disorder-driven transition and inverse melting of the vortex lattice
• Vortex glass transitions in disordered three-dimensional XY models: Simulations for several different sets of parameters
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• Possible Evidence for A Slush Vortex Phase in the Vicinity of Vortex Glass Transition in YBa${}_2$Cu${}_3$O${}_{7-\delta }$ Thin Films
• Phase Diagram of Vortices in High-Tc Superconductors from Lattice Defect Model with Pinning
• Unified Phase Diagram for the Three-Dimensional XY Model of a Point Disordered Type-II Superconductor
• Angle-dependent Magnetoresistance of an Ordered Bose Glass of Vortices in YBa${}_2$Cu${}_3$O${}_{7-\delta }$ Thin Films with a Periodic Pinning~Lattice
• Nonequilibrium critical dynamics of the three-dimensional gauge glass
• Dynamical regimes of vortex flow in type-II superconductors with parallel twin boundaries
• Pinning and elastic properties of vortex matter in highly strained Nb${}_{75}$Zr${}_{25}$: Analogy with viscous flow of disordered solids