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Cold
c'est froid!
Aimant

Cold

A crucial ingredient

Mercury is the metal in which superconductivity was first observed. It had to be cooled to -269°C, really close to absolute zero. The best superconductor we have yet discovered becomes superconducting below -135°C. The physics of superconductors is hence closely linked to the study of very low temperatures accessible with specific cooling techniques, using cryogenic liquids such as liquid helium or nitrogen, and even more sophisticated tools.

What does mean cold ?
Click and adjust the thermometer and see how matter reacts.

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At what temperature do we observe superconductivity ?
Superconductivity is actually observed only when it's colder than the coldest place on earth :

Le froid.<br/> Crédits Ame En Science, CNRS

CNRSSociété Française de PhysiqueTriangle de la physique
Pied de pagehey ! C'est un bord arrondi ?
c'est froid!
CNRSSociété Française de PhysiqueTriangle de la physique