The only element that can become a superfluid is Helium (He-3 and He-4) since it does not solidify not matter how cold it gets, hence it can reach the superfluid transition temperature whilst still a liquid.
Can we make an artificial mixture of elements such that this new material could also reach the superfluid transition temperature while still a liquid? In the same way as we dope semiconductors, can we 'dope' a fluid that would not normally not become a superfluid for it to exhibit such a phase transition?
