Phase Transition and Critical Dynamics in Diluted Josephson Junction Arrays
arXiv:cond-mat/0610688 · doi:10.1103/PhysRevLett.97.215701
Abstract
Measurements of the characteristics of site-diluted Josephson-junction arrays have revealed intriguing effects of percolative disorder on the phase transition and the vortex dynamics in a two-dimensional XY system. Different from other types of phase transitions, the Kosterlitz-Thouless (KT) transition was eliminated with the introduction of percolative disorder far below the percolation threshold. Even after the KT order had been removed, the system remained superconducting at low temperatures by establishing a different type of order. Near the percolation threshold, evidence was found that, as a consequence of the underlying fractal structure, the critical dynamics of the phase degrees of freedom persisted down to zero temperature.
9 pages, 4 figures, Phys. Rev. Lett.(accepted)
References in corpus (9)
- Nature of Phase Transitions of Superconducting Wire Networks in a Magnetic Field
- Is there a vortex-glass transition in high-temperature superconductors?
- Numerical Study of a Superconducting Glass Model
- Monte Carlo study of the critical temperature for the planar rotator model with nonmagnetic impurities
- Kosterlitz-Thouless transition in planar spin models with bond dilution
- Critical Behavior of Frustrated Josephson Junction Arrays with Bond Disorder
- Current-voltage characteristics of diluted Josephson-junction arrays: scaling behavior at current and percolation threshold
- Superconducting transition of a two-dimensional Josephson junction array in weak magnetic fields
- A Zero-Temperature Study of Vortex Mobility in Two-Dimensional Vortex Glass Models
Cited by in corpus (7)
- Phase transition in site-diluted Josephson junction arrays: A numerical study
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- First order phase transitions in classical lattice gas spin models
- Complex critical exponents for percolation transitions in Josephson-junction arrays, antiferromagnets, and interacting bosons
- Interplay of topological and structural defects in the 2D XY model
- Emergent tri-criticality in magnetic metamaterials
- Superconducting phase transitions in frustrated Josephson-junction arrays on a dice lattice