Disorder induced power-law response of a superconducting vortex on a plane

Abstract

We report drive-response experiments on individual superconducting vortices on a plane, a realization for a 1+1-dimensional directed polymer in random media. For this we use magnetic force microscopy (MFM) to image and manipulate individual vortices trapped on a twin boundary in YBCO near optimal doping. We find that when we drag a vortex with the magnetic tip it moves in a series of jumps. As theory suggests the jump-size distribution does not depend on the applied force and is consistent with power-law behavior. The measured power is much larger than widely accepted theoretical calculations.

4 pages, 4 figures, Supplemental Material file included

References in corpus (5)

• Growing interfaces uncover universal fluctuations behind scale invariance
• Mechanics of Individual, Isolated Vortices in a Cuprate Superconductor
• Dynamics below the depinning threshold
• Controlled Manipulation of Individual Vortices in a Superconductor
• Joint free energy distribution in the random directed polymer problem

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• Diamagnetic Vortex Barrier Stripes in Underdoped $BaF{e}_2(A{s}_{1-x}{P}_x{)}_2$
• Avalanches in Tip-Driven Interfaces in Random Media
• Dependence of the absolute value of the penetration depth in $(\mathbf{B}{\mathbf{a}}_{1-\mathbf{x}}{\mathbf{K}}_{\mathbf{x}})\mathbf{F}{\mathbf{e}}_2\mathbf{A}{\mathbf{s}}_2$ on doping
• Active Rheology and Anti-Commensuration Effects For Driven Probe Particles on Two Dimensional Periodic Pinning Substrates