Longitudinal and transverse noise in a moving Vortex Lattice

Abstract

We have studied the longitudinal and the transverse velocity fluctuations of a moving vortex lattice (VL) driven by a transport current. They exhibit both the same broad spectrum and the same order of magnitude. These two components are insensitive to the velocity and to a small bulk perturbation. This means that no bulk averaging over the disorder and no VL crystallization are observed. This is consistently explained referring to a previously proposed noisy flow of surface current whose elementary fluctuator is measured isotropic.

accepted for publication in Phys Rev B

References in corpus (6)

• Phase diagrams of flux lattices with disorder
• Moving glass phase of driven lattices
• Hall noise and transverse freezing in driven vortex lattices
• Transverse depinning in strongly driven vortex lattices with disorder
• Distribution of Transport Current in a Type II Superconductor Studied by Small Angle Neutron Scattering
• Location-Sensitive Measurement of the Local Fluctuation of Driven Vortex Density in Bi${}_2$Sr${}_2$CaCu${}_2$O${}_y$

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• Magnetoresistance, noise properties and the Koshino-Taylor effect in the quasi-1D oxide KRu_4O_8
• Experimental study of the correlation length of critical-current fluctuations in the presence of surface disorder: Probing vortex long-range interactions
• Narrow-band noise due to the moving vortex lattice in superconducting niobium
• Direct correlation between strengthening mechanisms and electrical noise in strained copper wires
• New Insight into the Fluctuations of the Moving Vortex Lattice: Non-Gaussian Noise and Levy Flights