Torsional Oscillator and Synchrotron X-Ray Experiments on SolidHe<mml:mprescripts/><mml:none/>4in Aerogel

2008/08/21 by N. Mulders, Joshua T. West, J. T. West +5 · 31 citations
Chemistry · Earth and Planetary Sciences · Environmental Science · Physics and Astronomy · #Chemistry #Computer science #Condensed matter physics #Crystal (programming language) #Crystallite #Crystallography #High-pressure geophysics and materials #Materials science #Methane Hydrates and Related Phenomena #Phase (matter) #Phase diagram #Physics #Quantum mechanics #Quantum, superfluid, helium dynamics #Supersolid #cond-mat.other

paper · pdf · doi:10.1103/physrevlett.101.165303

published in Physical Review Letters 101(16), 165303 (American Physical Society)

arxiv created 2008/08/21 · openalex publication_date 2008/10/16 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

X-ray diffraction experiments show that solid 4He 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 approximately 3 x 10(-4), and the onset temperature is approximately 100 mK.

Citations

• Superfluidity of Grain Boundaries in SolidHe<mml:mprescripts/><mml:none/>4
• Superglass Phase ofHe<mml:mprescripts/><mml:none/>4
• Fate of Vacancy-Induced Supersolidity inHe<mml:mprescripts/><mml:none/>4
• Annealing Effect for Supersolid Fraction in 4He
• Superfluidity of DenseHe<mml:mprescripts/><mml:none/>4in Vycor
• Effect ofHe<mml:mprescripts/><mml:none/>3Impurities on the Nonclassical Response to Oscillation of SolidHe<mml:mprescripts/><mml:none/>4
• Observation of Non-Classical Rotational Inertia in Bulk Solid 4He