2003/01/07 by Mario Freamat, K. -W. Ng, K.-W. Ng · 2 citations
Materials Science · Physics and Astronomy · #Magnetic and transport properties of perovskites and related materials #Magnetic properties of thin films #Physics of Superconductivity and Magnetism #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.68.060507
published as Published in Phys. Rev. B (RC) 68, 060507 (2003) · 4 pages and 4 figures Submitted to Physical Review Letters
arxiv created 2003/01/07 · openalex publication_date 2003/08/26 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We have performed temperature-dependent tunneling conductance spectroscopy on Fe/Ag/Bi2Sr2CaCu2O_8+\ensuremathδ (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=\ifmmode±\else\textpm\fi\ensuremathΔ. 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.