Abstract
X-ray diffraction experiments show that solid He4 grown in aerogel is highly polycrystalline, with an hcp crystal structure (as in bulk) and a crystallite size of approximately 100 nm. In contrast to the expectation that the highly disordered solid will have a large supersolid fraction, torsional oscillator measurements show a behavior that is strikingly similar to high purity crystals grown from the superfluid phase. The low temperature supersolid fraction is only ∼3×10-4, and the onset temperature is ∼100mK.
Original language | English (US) |
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Article number | 165303 |
Journal | Physical review letters |
Volume | 101 |
Issue number | 16 |
DOIs | |
State | Published - Oct 16 2008 |
All Science Journal Classification (ASJC) codes
- General Physics and Astronomy