High-quality, single-crystal, ultra-cold solid helium exhibits supersolid behavior, suggesting that this frictionless solid flow is not a consequence of defects and grain boundaries in poor-quality, ...

Solid helium represents a unique quantum solid whose low temperature properties challenge conventional understanding of condensed matter. Its remarkable behaviour, including supersolidity and quantum ...

Based on quantum mechanical calculations dating back to the 1970's, some physicists predicted similar effects in solid materials. In particular, they expected ultracold solid helium could become a ...

This is a preview. Log in through your library . Abstract Supersolidity, the appearance of zero-viscosity flow in solids, was first indicated in helium-4 torsional oscillator (TO) experiments. In this ...

In the Friday 3 September 2004 issue of Science Express, two physicists from Penn State University will announce new experimental evidence for the existence of a new phase of matter, a "supersolid" ...

In 2004 researchers reported the first clear evidence for superfluidity in solid helium-4. However, Matthew Chalmers describes recent experimental and theoretical work that has brought the very ...

Two physicists from Penn State University will announce new experimental evidence for the existence of a new phase of matter, a "supersolid" form of helium-4 with the extraordinary ...

Gases are flighty and flitting and expand to fill any available space. Liquids will also mold themselves to whatever shape they occupy, from soda bottle to swimming pool. Solids, though, are steadfast ...

Despatches from Holland related that a Professor Keesom had solidified that rare and undemonstrative gas, helium, by a process not too costly or laborious to be adopted industrially. By some ingenious ...

Physicists in the US have confirmed that solid helium can behave as a superfluid. Earlier this year Eun-Seong Kim and Moses Chan of Pennsylvania State University observed superfluid behaviour - fluid ...