Absence of Dipole Transitions in Vortices of Type II Superconductors

Details Absence of Dipole Transitions in Vortices of Type II Superconductors Absence of Dipole Transitions in Vortices of Type II Superconductors

1992-04-30

arxiv.org/abs/cond-mat/9204018v1

Physics

Condensed Matter

12 pages, no figures

Scientific paper

10.1103/PhysRevB.46.3680

The response of a single vortex to a time dependent field is examined microscopically and an equation of motion for vortex motion at non-zero frequencies is derived. Of interest are frequencies near $\Delta^{2}/E_{F}$, where $\Delta$ is the bulk energy gap and $E_{F}$ is the fermi energy. The low temperature, clean, extreme type II limit and maintaining of equilibrium with the lattice are assumed. A simplification occurs for large planar mass anisotropy. Thus the results may be pertinent to materials such as $NbSe_2$ and high temperature superconductors. The expected dipole transition between core states is hidden because of the self consistent nature of the vortex potential. Instead the vortex itself moves and has a resonance at the frequency of the transition.

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