Flux pinning and phase transitions in model high-temperature superconductors with columnar defects.

  title={Flux pinning and phase transitions in model high-temperature superconductors with columnar defects.},
  author={Lee and Stroud and Girvin},
  journal={Physical review. B, Condensed matter},
  volume={48 2},
  • Lee, Stroud, Girvin
  • Published 9 December 1992
  • Physics
  • Physical review. B, Condensed matter
We calculate the degree of flux pinning by defects in model high-temperature superconductors (HTSC's). The HTSC is modeled as a three-dimensional network of resistively shunted Josephson junctions in an external magnetic field, corresponding to a HTSC in the extreme type-II limit. Disorder is introduced either by randomizing the coupling between grains (model-[ital A] disorder) or by removing grains (model-[ital B] disorder). Three types of defects are considered: point disorder, random line… 
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