Nonlocal fluctuation electromagnetic response and magnetic scattering of neutrons near the superconducting transition temperature
Barash Yu. S., Galaktionov A. V.
A general expression is derived for that frequencyand wave-vector-dependent component of the transverse dielectric constant which stems from superconducting fluctuations, e{r(Q,,Q), for an isotropic bulk metal in the normal state near Tc. The conditions fl<Tc and ζ)ξΰ<\ are assumed. The differential cross section for magnetic scattering of neutrons at comparatively small angles near Tc is discussed.