Wiktionary
n. 1 A very efficient insulator 2 (context physics English) Any material that exhibits superinsulation
Wikipedia
A superinsulator is a material that at low temperatures under certain conditions has an infinite resistance and no current will pass through it. The superinsulating state has many parallels to the superconducting state, and can be destroyed (in a sudden phase transition) by increased temperature, magnetic fields and voltage.
The superinsulating state was first observed in a titanium nitride film in April 2008 by Russian scientists Valerii Vinokur and Tatyana Baturina working at Argonne National Laboratory, United States. Currently it is not known if the superinsulation state they observed means the dielectric permittivity of the material approaches infinity, or whether the material just has zero conduction as would be found in a vacuum.
Other researchers have seen the same phenomenon in disordered indium oxide films, but have proposed a different explanation for their observations.
Usage examples of "superinsulator".
The snowshoes were thick pucks of sandwiched superinsulator and the borrowed suit was a collection of bulky spheres that made him resemble a snowman with strings of beads for arms and legs.