Vortex interaction enhanced saturation number and caging effect in a superconducting film with a honeycomb array of nanoscale holes

M. L. Latimer, G. R. Berdiyorov, Z. L. Xiao, W. K. Kwok, and F. M. Peeters
Phys. Rev. B 85, 012505 – Published 26 January 2012

Abstract

The electrical transport properties of a MoGe thin film with a honeycomb array of nanoscale holes are investigated. The critical current of the system shows nonmatching anomalies as a function of applied magnetic field, enabling us to distinguish between multiquanta vortices trapped in the holes and interstitial vortices located between the holes. The number of vortices trapped in each hole is found to be larger than the saturation number predicted for an isolated hole and shows a nonlinear field dependence, leading to the caging effect as predicted from the Ginzburg-Landau (GL) theory. Our experimental results are supplemented by numerical simulations based on the GL theory.

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  • Received 26 November 2011

DOI:https://doi.org/10.1103/PhysRevB.85.012505

©2012 American Physical Society

Authors & Affiliations

M. L. Latimer1,2, G. R. Berdiyorov3, Z. L. Xiao1,2,*, W. K. Kwok1, and F. M. Peeters3,†

  • 1Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
  • 2Department of Physics, Northern Illinois University, DeKalb, Illinois 60115, USA
  • 3Departement Fysica, Universiteit Antwerpen, Groenenborgerlaan 171, B-2020 Antwerpen, Belgium

  • *xiao@anl.gov
  • francois.peeters@ua.ac.be

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Vol. 85, Iss. 1 — 1 January 2012

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