"Measurements on a superconducting material show an abrupt transition between a normal metal and a "strange" metal. The really strange thing, however, is that this abruptness disappears when the temperature falls.
The moral of the story, says Zaanen, is that the origin of superconductivity itself is increasingly a side issue. "After thirty years, evidence is mounting that high Tc -superconductivity is pointing toward a radically New Form of Matter, which is governed by the consequences of Quantum Entanglement in the macroscopic world."
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