Search for complex order parameters in grain boundary junctions

W. K. Neils, D. J. Van Harlingen

Research output: Contribution to journalArticlepeer-review


We are measuring the critical current of grain boundary Josephson junctions fabricated from pure and magnetically doped cuprate films to search for the onset of subdominant superconducting phases. Complex order parameters dx2-y2 + is or dx2-y2 + idxy are predicted to arise near interfaces and magnetic impurities due to a suppression of the d-wave state by Andreev reflection from the strongly anisotropic order parameter. Simulations indicate that this should significantly alter the variation of the critical current with temperature and magnetic field.

Original languageEnglish (US)
Pages (from-to)587-588
Number of pages2
JournalPhysica B: Condensed Matter
Issue numberPART I
StatePublished - 2000


  • Grain boundaries
  • Josephson junctions
  • Order parameter
  • YBaCuO patterned

ASJC Scopus subject areas

  • General Materials Science
  • Condensed Matter Physics


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