Sébastien Balibar
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How could a solid be superfluid?
Experiments indicate that, as in a superfluid, mass can flow through solid helium-4 without viscous resistance. Recent calculations shed light on how this may happen thanks to defects in the crystal lattice. Read More »
Viewpoint
Is there a true supersolid phase transition ?
New measurements of the rigidity of solid helium show that the emergence of supersolidity is actually a crossover, rather than a true phase transition. Read More »