Resonant Magnetic Vortices

Details Resonant Magnetic Vortices Resonant Magnetic Vortices

2002-07-30

arxiv.org/abs/cond-mat/0207696v2

Phys. Rev. A 67, 042704 (2003)

Physics

Condensed Matter

6 pages, 7 figures

Scientific paper

10.1103/PhysRevA.67.042704

By using the complex angular momentum method, we provide a semiclassical analysis of electron scattering by a magnetic vortex of Aharonov-Bohm-type. Regge poles of the $S$-matrix are associated with surface waves orbiting around the vortex and supported by a magnetic field discontinuity. Rapid variations of sharp characteristic shapes can be observed on scattering cross sections. They correspond to quasibound states which are Breit-Wigner-type resonances associated with surface waves and which can be considered as quantum analogues of acoustic whispering-gallery modes. Such a resonant magnetic vortex could provide a new kind of artificial atom while the semiclassical approach developed here could be profitably extended in various areas of the physics of vortices.

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