What is the material with the lowest resistivity?

What is the material with the lowest resistivity?

At room temperature, the natural products should be silver and copper
But in the artificial products and certain conditions
The resistivity can be reduced to 0
This is called superconductor
But now superconductivity is below zero n degrees
It seems that the highest temperature superconducting materials are more than minus 70 degrees. Wow, I can't remember it
I hope I can help you

We need the resistivity of some common liquids and solids
It's better to have liquid ~ gas``````

Some good conductors arranged by resistivity from small to large (the resistivity at 18 ℃ in square brackets is Ω. Mm ^ 2 / M)
Simple substance:
Silver [0.0156], copper [0.0168], gold [0.0221], aluminum [0.0272], chromium [0.026], magnesium [0.043], calcium [0.045], sodium [0.046], tungsten [0.0532], zinc [0.0595], potassium [0.069], nickel [0.075], iron [0.099], tin [0.113], lead [0.207], mercury [0.954]
Alloy:
Brass (copper 66% + zinc 34%, [0.065]), manganin (indium 84% + manganese 12% + nickel 4%, [0.48]), constantan (copper 54% + nickel 46%, [0.50]), nickel chromium alloy (nickel 60% + chromium 15% + iron 25%, [1.10]))
Electrolyte (when the content of anhydrous electrolyte is 5%):
Copper sulfate [0.01890], sodium chloride [0.0672], potassium chloride [0.069], sulfuric acid [0.2085], salt [0.3948]
Reference: Handbook for middle school physics teachers