What if you could run your air conditioner not on conventional electricity, but on the sun’s heat during a warm summer’s day? With advancements in thermoelectric technology, this sustainable solution might one day become a reality.
Metals, which conduct electricity, and insulators, which don’t, are polar opposites. At least that’s what we’ve believed until now. But we have discovered that a well-known insulator can simultaneously act like a conductor in certain measurements. We don’t yet know the reason for this mysterious behaviour but it is likely due to new and exciting quantum effects.