2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/28553We present calculations of the single-particle excitation spectrum for a 2D strong-coupling superconductor in a conserving approximation. Spectral weight at low frequency is substantially reduced as the superconducting transition is approached from the normal state. The suppression of low-energy excitations is a consequence of Cooper-pair fluctuations that are described self-consistently in the fluctuation exchange approximation. The static and uniform electromagnetic response provides a measure of the super fluid density and a fully self-consistent indication of the superconducting transition temperature.10 pages and 3 figures (1 color). To appear in Phil. Mag. LettSuperconductivityStrongly Correlated Electronstext