Experimental evidence of a fractal dissipative regime in high-T_c superconductors

Abstract

We report on our experimental evidence of a substantial geometrical ingredient characterizing the problem of incipient dissipation in high-T_c superconductors(HTS): high-resolution studies of differential resistance-current characteristics in absence of magnetic field enabled us to identify and quantify the fractal dissipative regime inside which the actual current-carrying medium is an object of fractal geometry. The discovery of a fractal regime proves the reality and consistency of critical-phenomena scenario as a model for dissipation in inhomogeneous and disordered HTS, gives the experimentally-based value of the relevant finite-size scaling exponent and offers some interesting new guidelines to the problem of pairing mechanisms in HTS.

5 pages, 3 figures, RevTex; Accepted for publication in Physical Review B; (figures enlarged)

References in corpus (1)

• Current-voltage characteristics of diluted Josephson-junction arrays: scaling behavior at current and percolation threshold

Cited by in corpus (12)

• Fractional generalization of the Ginzburg-Landau equation: An unconventional approach to critical phenomena in complex media
• Fracton pairing mechanism for "strange" superconductors: Self-assembling organic polymers and copper-oxide compounds
• Dynamics of the magnetic flux trapped in fractal clusters of normal phase in a superconductor
• The origins of macroscopic quantum coherence in high temperature super conductivity
• Anomalous statistical properties of the critical current distribution in superconductor containing fractal clusters of a normal phase
• Peculiarities of the resistive transition in fractal superconducting structures
• Giant dispersion of critical currents in superconductor with fractal clusters of a normal phase
• Critical currents and vortex dynamics in percolative superconductors containing fractal clusters of a normal phase
• Vortex Dynamics in Percolative Superconductors Containing Fractal Clusters of a Normal Phase
• Depinning at the initial stage of the resistive transition in superconductors with a fractal cluster structure
• Slow fracton modes in antiferromagnetic correlations of high-Tc superconductors
• Vortex Dynamics at the Initial Stage of Resistive Transition in Superconductors with Fractal Cluster Structure