Abstract
We report on the observation of nonclassical rotational inertia in solid helium-4 confined to an annular channel in a sample cell under torsional motion, demonstrating superfluid behavior. The effect shows up as a drop in the resonant oscillation period as the sample cell is cooled below 230 millikelvin. Measurement of 17 solid samples allows us to map out the boundary of this superfluid-like solid or supersolid phase from the melting line up to 66 bars. This experiment indicates that superfluid behavior is found in all three phases of matter.
Original language | English (US) |
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Pages (from-to) | 1941-1944 |
Number of pages | 4 |
Journal | Science |
Volume | 305 |
Issue number | 5692 |
DOIs | |
State | Published - Sep 24 2004 |
All Science Journal Classification (ASJC) codes
- General