Abstract
The mass flux, , carried by as-grown solid in the range 25.6–26.3 bar rises with falling temperature, and at a concentration-dependent temperature, , the flux decreases sharply within a few mK. We study as a function of impurity concentration, . We find that is an increasing function of increasing . At temperatures above the flux has a universal temperature dependence and the flux terminates in a narrow window near a characteristic temperature , which is independent of .
- Received 14 April 2014
DOI:https://doi.org/10.1103/PhysRevLett.113.035302
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