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Published on: November 19, 2016
Dynamics of the Vortex-Particle Complexes Bound to the Free Surface of Superfluid Helium
P Moroshkin1,2, P Leiderer3, K Kono1,4
1RIKEN Center for Emergent Matter Science, 2-1 Hirosawa, Wako, 351-0198 Saitama, Japan.
Abstract:
We present an experimental and theoretical study of the 2D dynamics of electrically charged nanoparticles trapped under a free surface of superfluid helium in a static vertical electric field. We focus on the dynamics of particles driven by the interaction with quantized vortices terminating at the free surface. We identify two types of particle trajectories and the associated vortex structures: vertical linear vortices pinned at the bottom of the container and half-ring vortices traveling along the free surface of the liquid.
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