Defect Formation in Quench-Cooled Superfluid Phase Transition

Details Defect Formation in Quench-Cooled Superfluid Phase Transition Defect Formation in Quench-Cooled Superfluid Phase Transition

1997-06-05

arxiv.org/abs/cond-mat/9706038v2

Phys. Rev. Lett. 80 (1998) 1465

Physics

Condensed Matter

Statistical Mechanics

RevTex file, 4 pages, 3 figures, resubmitted to Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.80.1465

We use neutron absorption in rotating 3He-B to heat locally a 10 micrometer-size volume into normal phase. When the heated region cools back in microseconds, vortex lines are formed. We record with NMR the number of lines as a function of superflow velocity and compare to the Kibble-Zurek theory of vortex-loop freeze-out from a random network of defects. The measurements confirm the calculated loop-size distribution and show that also the superfluid state itself forms as a patchwork of competing A and B phase blobs. This explains the A to B transition in supercooled neutron-irradiated 3He-A.

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