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Mass transport through dislocation network in solid 4He
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DOI：10.1103/PhysRevB.99.140502.png)
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Abstract
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We studied the transport of He-4 atoms through 2.5-mm-thick solid He-4 samples sandwiched between two superfluid leads with five different tailor-made sample cells. Measurements in a cell with a barrier at the center of the solid samples and in a cell filled with silica aerogel establish the causal relation between the observed mass flow and the dislocation network in the solid sample. Comparing the results from these cells and prior measurements on solid samples with thicknesses of 2 cm and 8 mu m reveals that the mass flow rate decreases logarithmically with the thickness of the solid He-4. Interestingly, the mass flow exhibits both superfluid and bosonic Luttinger liquid characteristics at low temperature.
Keywords:
LUTTINGER
BEHAVIOR
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