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VOLUME 45 (1987) | ISSUE 9 | PAGE 413
Properties of superconductors with a strong electron-phonon interaction
An electron and phonon system with a strong coupling, λ > 1, is considered. The temperature dependence of the upper critical field Hc2 has a positive curvature. A relationship is established among the following quantities: the electron state density N(0), the abrupt change in the specific heat AC, the upper and lower HcX critical fields, and the residual resistivity p.