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Frequency evolution of neutron peaks below<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>T</mml:mi></mml:mrow><mml:mrow><mml:mi>c</mml:mi></mml:mrow></mml:msub></mml:mrow><mml:mo>:</mml:mo></mml:math>Commensurate and incommensurate structure in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">La</mml:mi></mml:mrow><mml:mrow><mml:mn>0.85</mml:mn></…
We study the evolution of the neutron cross section with variable frequency $\ensuremath{\omega}$ and fixed T below ${T}_{c}$ in two different cuprate families. Our calculations, which predominantly probe the role of d-wave pairing, lead to generic features, independent of Fermi-surface shapes. Among our findings, reasonably consistent with experiment, are (i) …