The effect (below 0.1K) of3He ppb impurities on the critical flow of4He through a micro-aperture has been studied for T<0.05K to investigate vortex creation at a wall. The width of the phase slip probability is found to be reduced at low temperature by 30%, implying that the3He modifies the tunneling barrier to the vortex state.
|Journal||Physica B: Physics of Condensed Matter|
|Publication status||Published - 2 Feb 1994|
|Event||20th International Conference on Low Temperature Physics, LT-20 1993 - Eugene, United States|
Duration: 4 Aug 1993 → 11 Aug 1993
Conference number: 20