Mass flux and solid growth in solid 4He: 60 mK - 700 mK

Abstract

We use the thermo-mechanical effect to create a chemical potential difference between two liquid reservoirs connected to each other through Vycor rods in series with solid hcp 4He to confirm that a DC flux of atoms takes place below 600 mK, but find that the flux falls abruptly in the vicinity of 80 mK. It is impossible to add density to a solid freshly made at 60 mK and samples freshly made at 60 mK do not allow mass flux, even when raised in temperature to 200 mK. Solids created above 300 mK and cooled to 60 mK accept added density and demonstrate finite mass flux.

4 pages, 5 figures

References in corpus (4)

• Low Temperature Shear Modulus Changes in Solid 4-He and Connection to Supersolidity
• Observation of Unusual Mass Transport in Solid hcp 4He
• Ring exchanges and the supersolid phase of 4He
• A non-superfluid origin of the non-classical rotational inertia in a bulk sample of solid 4He

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• Tunnelling defect nanoclusters in hcp 4He crystals: alternative to supersolidity
• Supersolid induced by dislocations with superfluid cores (Review article)
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• The role of Helium-3 impurities in the stress induced roughening of superclimbing dislocations in solid Helium-4
• Superfluid Field response to Edge dislocation motion
• The role of glass dynamics in the anomaly of the dielectric function of solid helium
• Quantized vortex state in hcp solid 4He