2013/11/19 by Ye. Vekhov, Vekhov, Ye., W. J. Mullin +3
Physics and Astronomy · #FOS: Physical sciences #Other Condensed Matter (cond-mat.other) #cond-mat.other
paper · pdf · doi:10.48550/arxiv.1311.4913
4 pages, 5 figures
arxiv created 2014/07/16 · arxiv updated 2014/07/17
The flux, F, carried by solid 4He in the range 25.6 - 26.3 bar rises with falling temperature and at a temperature Td the flux decreases toward zero. We study F as a function of 3He impurity concentration, χ. At temperatures above Td the flux has an unexpected universal temperature dependence and the flux terminates in a narrow window near a characteristic temperature Th ≈ 610 mK, which is independent of χ. We find that Td is an increasing function of increasing χ. We document that the extinction of the flux at Td is prompt and precipitous, with the transition complete within a few mK. Comparison of our (Td, χ) results with a calculated phase separation line suggests that the extinction of the flux is related to phase separation.