2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/20285Inelastic neutron scattering experiments in high-$T_c$ cuprates have evidenced a new magnetic excitation present in the superconducting state. In particular, recent experiments on single layer Tl$_{2}$Ba$_{2}$CuO$_{6+δ}$, performed near optimum doping ($ T_{c} \sim 90$ K), provide evidence of a sharp magnetic resonant mode below $ T_{c}$, similar to previous reports on the YBCO and BSCCO bilayer systems. This result supports models that ascribe a key role to magnetic excitations in the mechanism of superconductivity.Proceedings of the LT23 conference (Hiroshima-Aug2002)SuperconductivityStrongly Correlated Electronstext