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Comparison of the electrodynamic properties of sintered YBa/sub 2/Cu/sub 3/O(7-y) and La(1. 85)Sr(0. 15)CuO(4-y)

Technical Report ·
OSTI ID:6703600
The reflectivity in the superconducting and normal sites of YBa/sub 2/Cu/sub 3/O/sub 7-y/ has been reproduced with the effective-medium theory plus an anisotropic dielectric function and the Mattis-Bardeen conductivity with a gap value 2 delta/kBTc=2.5 to 2.7. It was found that the lowest IR-active phonon polarized in the high-conductivity plane produces structure in the superconducting gap, the lowest-frequency phonon perpendicular to the plane is overdamped, and the electronic susceptibility is more isotropic for YBa/sub 2/Cu/sub 3/O/sub 7-y/ than for La/sub 1.85/Sr/sub 0.15/CuO/sub 4-y/.
Research Organization:
Cornell Univ., Ithaca, NY (USA)
OSTI ID:
6703600
Report Number(s):
AD-A-196374/3/XAB
Country of Publication:
United States
Language:
English