News of the WeekCondensed-Matter Physics

Free-Flowing Supersolid Confirmed, But Origins Remain Murky

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Science  24 Mar 2006:
Vol. 311, Issue 5768, pp. 1693
DOI: 10.1126/science.311.5768.1693a

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BALTIMORE, MARYLAND-- Since it was first reported that solid helium could flow without resistance, like a liquid devoid of viscosity, three other groups have reproduced the bizarre effect. But data presented here last week at an American Physical Society meeting also suggest that the "supersolid" flow occurs only in crystals riddled with defects. (Read more.)