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Theory of Neutron Scattering in the Normal and Superconducting State of YBCO
We analyze neutron experiments on \ybco at various stoichiometries in the
superconducting state, within the context of a bi-layer theory which yields
good agreement with the normal state Cu-NMR and neutron data as a function of
\omega, q and T. A d-wave superconducting state exhibits peaks at q = ( \pi ,
\pi , \pi ) and sharp maxima as a function of \omega, at twice the gap
frequency. This behavior may have been observed experimentally. The counterpart
behavior for other choices of order parameter symmetry is discussed.Comment: uuencoded postscript file for the entire paper enclose