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Supersolids reliant on disorder, say physicists Physicists in the US have shown that a supposed quantum phase of matter known as a "supersolid" is strongly dependent on the amount of crystal disorder present in the sample being studied. By performing experiments on samples of helium-4 with large amounts of disorder, they found that the trademark effects of supersolidity in the samples rose to more than 20% -- by far the largest proportion seen so far.
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