Controlled electromigration of thin Pb films started from the normal and from the superconducting state

  title={Controlled electromigration of thin Pb films started from the normal and from the superconducting state},
  author={Dominik Staudt and Regina Hoffmann-Vogel},
  journal={Journal of Physics D},
We have investigated the electromigration of thin Pb films with a weak link, performing the main sample fabrication steps in ultra-high vacuum and avoiding organic chemicals. In the normal state, upon a current flow, joule heating leads to an increased temperature and electromigration proceeds due to thermal activation. Cyclic controlled electromigration at 300 K and at 77 K can be well-described by a model used previously where the feed resistance and the power dissipated in the contact remain… 

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