Order parameter oscillations in Fe/Ag/Bi2Sr2CaCu2O{8+delta} tunnel junctions

Mario Freamat; K. -W. Ng

doi:10.1103/PhysRevB.68.060507

Order parameter oscillations in Fe/Ag/Bi2Sr2CaCu2O{8+delta} tunnel junctions

Superconductivity 2009-11-10 v1

Authors: Mario Freamat , K. -W. Ng

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Abstract

We have performed temperature dependent tunneling conductance spectroscopy on Fe/Ag/Bi2Sr2CaCu2O8 (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 = +/-Delta. Spectral features characteristic to a broken time-reversal pairing symmetry are detected and they do not depend on the geometrical characteristics of the ferromagnetic film.

Keywords

iron-based superconductor superconducting tunnel junctions phase transitions

Cite

@article{arxiv.cond-mat/0301081,
  title  = {Order parameter oscillations in Fe/Ag/Bi2Sr2CaCu2O{8+delta} tunnel junctions},
  author = {Mario Freamat and K. -W. Ng},
  journal= {arXiv preprint arXiv:cond-mat/0301081},
  year   = {2009}
}

Comments

4 pages and 4 figures Submitted to Physical Review Letters

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