Supersolid behavior in confined geometry

Abstract

We have carried out torsional oscillator (TO) and heat capacity (HC) measurements on solid 4He samples grown within a geometry which restricts the helium to thin (150 um) cylindrical discs. In contrast to previously reported values from Rittner and Reppy of 20% non-classical rotational inertia (NCRI) for similar confining dimensions, 0.9% NCRI (consistent with that found in bulk samples and samples imbedded in porous media) was observed in our TO cell. In this confined geometry the heat capacity peak is consistent with that found in bulk solid samples of high crystalline quality.

References in corpus (21)

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• Luttinger Liquid in the Core of Screw Dislocation in Helium-4
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• 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
• Vortex Fluid State below an Onset Temperature T_0 of Solid 4He
• Heat capacity peak in solid 4He: Effects of disorder and 3He impurities
• Torsional oscillator and synchrotron x-ray experiments on solid 4He in aerogel
• Binding of a 3He impurity to a screw dislocation in solid 4He
• New Dissipation Relaxation Phenomenon in Oscillating Solid He-4

Cited by in corpus (5)

• Defect-induced supersolidity with soft-core bosons
• A glassy contribution to the heat capacity of hcp ${}^4$He solids
• Non-Classical Response from Quench-Cooled Solid Helium Confined in Porous Gold
• Simultaneous investigation of shear modulus and torsional resonance of solid 4He
• Saga of Superfluid Solids