TY - JOUR
T1 - Order parameter oscillations in Fe/Ag/Bi2Sr2CaCu2O8+δ tunnel junctions
AU - Freamat, Mario
AU - Ng, K. W.
PY - 2003/8/1
Y1 - 2003/8/1
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevB.68.060507
DO - 10.1103/PhysRevB.68.060507
M3 - Article
AN - SCOPUS:5544282696
SN - 1098-0121
VL - 68
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 6
ER -