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Paper detail

Mode-filtered electron injection into a waveguide interferometer

Injection of mode-filtered electrons into a phase-sensitive four-terminal waveguide Aharonov-Bohm (AB) ring is studied. An individually tuneable quantum point contact (QPC) in a waveguide lead of the GaAs/AlGaAs-ring allows to selectively couple to one-dimensional modes in the ring. Thus, we demonstrate single-mode transport in a multi-mode waveguide structure. Coherent mode-filtering by the lowest QPC subband is verified by non-local bend resistance and phase-sensitive AB interference measurements.

preprint2010arXivOpen access
Sven S. BuchholzUlrich KunzeSaskia F. FischerDirk ReuterAndreas D. Wieck
cond-mat.mes-hall
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Sven S. BuchholzUlrich KunzeSaskia F. FischerDirk ReuterAndreas D. Wieck

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