Condensed Matter Physics Seminar
Thursday, November 12, 1998, 4 p.m.
Plant Sciences Building, Room 1130
Spectral flow and vortex dynamics
(Department of Physics, University of Illinois at Urbana-Champaign)
Abstract: When an Abrikosov vortex moves with respect to the
background superfluid, the Magnus force causes a flow of momentum into
the vortex core. This momentum is transferred to the quasiparticles bound
in the vortex core by a "spectral flow" driven by Andreev reflection. The
resultant non-equilibrium quasiparticle leads to a further transfer of
momentum to the lattice through scattering of the quasiparticles off impurities.
This last momentum flow is the Kopnin-Kravtsov friction force.
Host: Victor Yakovenko
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