What is the reason for the resistance change in a normal metal with increasing temperature while that of superconductors remains constant?

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Pedro L. Contreras E.

Prof. Rk Naresh

Resistivity in BCS superconductors is equal to zero below the second-order transition temperature. See for example

https://en.wikipedia.org/wiki/BCS_theory

As the temperature is increased in a normal metal, the scattering mechanism that prevails in normal metals is electron-phonon scattering.

See for example:

Electrons and Phonons: The Theory of Transport Phenomena in Solids. Oxford Classic Texts in the Physical Sciences, by Prof. J. M. Ziman

Rk Naresh

Dr Pedro L. Contreras E. thank you for your contribution to the discussion