Journal
PHYSICAL REVIEW LETTERS
Volume 96, Issue 20, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.96.205301
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We report on the observation of an anomalously high damping measured by a vibrating-wire resonator (VWR) immersed into superfluid He-3-B at ultralow temperatures. The observed dissipation is orders of magnitude above that corresponding to friction with the dilute normal fraction and superfluid vortices. A clear pinning behavior is also observed, as well as a strong magnetic field dependence. Our analysis points to the interaction of the VWR with a planar topological defect, analogue to cosmological vacua defects, as proposed by Salomaa and Volovik.
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