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 (11)

• 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
• The fate of vacancy-induced supersolidity in 4He
• Observation of non-classical rotational inertia in bulk solid 4He
• Supersolid Helium at High Pressure
• Annealing Effect for Supersolid Fraction in ${}^4$He
• Bose Einstein Condensation of incommensurate solid 4He
• Dissipation peak as an indicator of sample inhomogeneity in solid ${}^4$He oscillator experiments
• Possible role of 3He impurities in solid 4He

Cited by in corpus (20)

• 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
• Thermal History of Solid 4He Under Oscillation
• 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
• Theory of the superglass phase
• 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
• A glassy contribution to the heat capacity of hcp ${}^4$He solids
• NMR study of the dynamics of 3He impurities in the proposed supersolid state of solid 4He
• Zero-point vacancies in quantum solids
• Leggett's bound for amorphous 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