Order parameter oscillations in Fe/Ag/Bi2Sr2CaCu2O8+δ tunnel junctions

Mario Freamat, K. W. Ng

Research output: Contribution to journalArticlepeer-review

15 Scopus citations


We have performed temperature-dependent tunneling conductance spectroscopy on Fe/Ag/Bi2Sr2CaCu2O8+δ (BSCCO) planar junctions. The multilayered Fe counterelectrode was designed to probe the proximity region of the ab plane of BSCCO. The spectra manifested a coherent oscillatory behavior with magnitude and sign dependent on the energy, decaying with increasing distance from the junction barrier, in conjunction with the theoretical predictions involving d-wave superconductors coupled with ferromagnets. The conductance oscillates in antiphase at E=0 and E=±Δ. The zero-bias conductance peak behavior is explained by a spin-dependent energy shift and the presence of a broken time-reversal pairing symmetry, which do not depend on the geometrical characteristics of the ferromagnetic film.

Original languageEnglish
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number6
StatePublished - Aug 1 2003

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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