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

N. Shapira; Y. Lamhot; O. Shpielberg; Y. Kafri; B. J. Ramshaw; D. A. Bonn; Ruixing Liang; W. N. Hardy; O. M. Auslaender

doi:10.1103/physrevb.92.100501

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arXiv · 1401.0995

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

N. Shapira·Y. Lamhot·O. Shpielberg·Y. Kafri·B. J. Ramshaw·D. A. Bonn·Ruixing Liang·W. N. Hardy·O. M. Auslaender

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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.

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cond-mat.supr-con cond-mat.dis-nn cond-mat.mes-hall cond-mat.soft cond-mat.stat-mech

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N. Shapira, Y. Lamhot, O. Shpielberg, Y. Kafri, B. J. Ramshaw, D. A. Bonn, Ruixing Liang, W. N. Hardy, O. M. Auslaender. 2014-01-06. Disorder induced power-law response of a superconducting vortex on a plane. https://doi.org/10.1103/physrevb.92.100501

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