# Specific Resistivity as a Function of Temperature

| Here is a plot of the specific resistivity vs. temperature for some metals.
|  | The resistivity seems to go to 0 for 0 K. This is not really true, cf. the detailed curve for Na.
|  | Still, simple free electron theory predicts zero resistance at 0 K, and trying to see if that is true was one of the driving forces behind the discovery of superconductivity by Kammerlingh Onnes in 1911.

With frame

2.2.1 Conductors

Residual Resistivity and Defects

© H. Föll (Advanced Materials B, part 1 - script)