Nonclassical Rotational Inertia in Single Crystal Helium

Abstract

It has been proposed that the observed nonclassical rotational inertia (NCRI) in solid helium results from the superflow of thin liquid films along interconnected grain boundaries within the sample. We have carried out new torsional oscillator measurements on large helium crystals grown under constant temperature and pressure. We observe NCRI in all samples, indicating that the phenomenon cannot be explained by a superfluid film flowing along grain boundaries.

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References in corpus (7)

• Luttinger Liquid in the Core of Screw Dislocation in Helium-4
• Disorder and the Supersolid State of Solid ${}^4$He
• Oscillation Frequency Dependence of Non-Classical Rotation Inertia of Solid ${}^4$He
• Ring exchanges and the supersolid phase of 4He
• Observation of non-classical rotational inertia in bulk solid 4He
• Annealing Effect for Supersolid Fraction in ${}^4$He
• Dissipation peak as an indicator of sample inhomogeneity in solid ${}^4$He oscillator experiments

Cited by in corpus (17)

• Low Temperature Shear Modulus Changes in Solid 4-He and Connection to Supersolidity
• Evidence for a Superglass State in Solid 4He
• The effect of 3He impurities on the nonclassical response to oscillation of solid 4He
• Probing the Upper Limit of Nonclassical Rotational Inertia
• Theory of the superglass phase
• Solid 4He and the Supersolid Phase: from Theoretical Speculation to the Discovery of a New State of Matter? A Review of the Past and Present Status of Research
• Thermal History of Solid 4He Under Oscillation
• Wetting Properties of Grain Boundaries in Solid Helium 4
• Quenched Dislocation Enhanced Supersolid Ordering
• Heat capacity peak in solid 4He: Effects of disorder and 3He impurities
• Torsional oscillator and synchrotron x-ray experiments on solid 4He in aerogel
• Compressibility of solid helium
• Zero-point vacancies in quantum solids
• Finite size Berezinski-Kosterlitz-Thouless transition at grain boundaries in solid ${}^4$He and role of ${}^3$He impurities
• Quantum plasticity and dislocation-induced supersolidity
• Mott Insulator - Superfluid Transitions in a Two Band Model at Finite Temperature and Possible Application to Supersolid 4He
• Surface instability and isotopic impurities in quantum solids