2001/10/31 by Kevin E. Bassler, Bassler, Kevin E., Joern Davidsen +4
Computer Science · Earth and Planetary Sciences · Physics and Astronomy · #Computational Physics and Python Applications #Disordered Systems and Neural Networks (cond-mat.dis-nn) #FOS: Physical sciences #Meteorological Phenomena and Simulations #Physics of Superconductivity and Magnetism #Statistical Mechanics (cond-mat.stat-mech) #Superconductivity (cond-mat.supr-con) #cond-mat.dis-nn #cond-mat.stat-mech #cond-mat.supr-con
paper · pdf · doi:10.48550/arxiv.cond-mat/0110641
4 pages, 3 figures included
arxiv created 2001/10/31 · openalex publication_date 2001/10/31 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Current-voltage measurements of type-II superconductors are described by a coarse-grained model of superconducting vortex dynamics. We find that the power spectra of the voltage fluctuations, and the noise power, are related to the large scale morphology of the plastic flux flow. At currents corresponding to the peak in differential resistance, the flux flow forms a braided river, the noise power is maximal, and the power spectra has a 1/fα form with α≈ 1.8 over a wide frequency range. This agrees with recent experiments on NbSe2. The observed variation of αwith applied current is a crossover phenomenon.