Universal disorder-induced transition in the resistivity behavior of strongly coupled metals.

At low temperatures (T(c)0.1(theta)(D)) new universal transition in the resistivity behavior of strongly coupled superconductors have been demonstrated experimentally. The power low behavior changes from T(n)(n=3-5) to T(2) as disorder increases, provided electron-phonon coupling (lambda) is sufficiently high. The physics of the effect is probably based on the breakdown of the electron-phonon conservation law. Universal correlation allows independent estimates of (lambda).