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- W2043283983 abstract "The effects of half-bound states or zero-energy resonances on the electronic magnetotransport in Aharonov-Bohm rings are investigated. These states can be obtained by adding attractive impurity potentials within the ring. In the most symmetric case of attractive impurities located on the two crossings with the leads connecting the ring to the external reservoirs, the zero-energy resonance condition can be reduced to a simple analytical expression containing the magnetic field and the impurity parameters. If the resonance occurs at zero magnetic field, it is pushed into the discrete spectrum for finite fields, and the two bound states become degenerate for magnetic flux ensuremath{Phi}=h/2e for arbitrary ring size. This system provides an ideal experimental setup for studying the particular properties of half-bound states, which correspond to the exceptional solutions of Levinson's theorem. It is also shown that the presence of a zero-energy resonance has dramatic consequences in the magnetic-field dependence of the conductance." @default.
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- W2043283983 date "1997-01-15" @default.
- W2043283983 modified "2023-10-17" @default.
- W2043283983 title "Magnetoconductance of Aharonov-Bohm rings with half-bound states" @default.
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- W2043283983 doi "https://doi.org/10.1103/physrevb.55.1353" @default.
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