Critical Velocity of Vortex Nucleation in Rotating Superfluid 3He-A

Details Critical Velocity of Vortex Nucleation in Rotating Superfluid 3He-A Critical Velocity of Vortex Nucleation in Rotating Superfluid 3He-A

1997-08-29

arxiv.org/abs/cond-mat/9708226v1

Phys. Rev. Lett. 79, 5058 (1997)

Physics

Condensed Matter

Soft Condensed Matter

4 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.79.5058

We have measured the critical velocity v_c at which 3He-A in a rotating cylinder becomes unstable against the formation of quantized vortex lines with continuous (singularity-free) core structure. We find that v_c is distributed between a maximum and minimum limit, which we ascribe to a dependence on the texture of the orbital angular momentum l(r) in the cylinder. Slow cool down through T_c in rotation yields l(r) textures for which the measured v_c's are in good agreement with the calculated instability of the expected l texture.

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