Condensed Matter Physics Seminar

Thursday, November 12, 1998, 4 p.m.
Plant Sciences Building, Room 1130


Spectral flow and vortex dynamics

Michael Stone

(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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