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Resonant reflection at magnetic barriers in quantum wires

Hengyi Xu·T. Heinzel·M. Evaldsson·S. Ihnatsenka·I. V. Zozoulenko
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Abstract

The conductance of a quantum wire containing a single magnetic barrier is studied numerically by means of the recursive Greens function technique. For sufficiently strong and localized barriers, Fano - type reflection resonances are observed close to the pinch-off regime. They are attributed to a magnetoelectric vortex-type quasibound state inside the magnetic barrier that interferes with an extended mode outside. We furthermore show that disorder can substantially modify the residual conductance around the pinch-off regime.

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Hengyi Xu, T. Heinzel, M. Evaldsson, S. Ihnatsenka, I. V. Zozoulenko. 2007-03-20. Resonant reflection at magnetic barriers in quantum wires. https://doi.org/10.1103/physrevb.75.205301

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