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arXiv · 1509.04437

Nanoscale Mach-Zehnder interferometer with spin-resolved quantum Hall edge states

Biswajit Karmakar·Davide Venturelli·Luca Chirolli·Vittorio Giovannetti·Rosario Fazio·Stefano Roddaro·Loren N. Pfeiffer·Ken W. West·Fabio Taddei·Vittorio Pellegrini
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Abstract

We realize a nanoscale-area Mach-Zehnder interferometer with co-propagating quantum Hall spin-resolved edge states and demonstrate the persistence of gate-controlled quantum interference oscillations, as a function of an applied magnetic field, at relatively large temperatures. Arrays of top-gate magnetic nanofingers are used to induce a resonant charge transfer between the pair of spin-resolved edge states. To account for the pattern of oscillations measured as a function of magnetic field and gate voltage, we have developed a simple theoretical model which satisfactorily reproduces the data.

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Biswajit Karmakar, Davide Venturelli, Luca Chirolli, Vittorio Giovannetti, Rosario Fazio, Stefano Roddaro, Loren N. Pfeiffer, Ken W. West, Fabio Taddei, Vittorio Pellegrini. 2015-11-04. Nanoscale Mach-Zehnder interferometer with spin-resolved quantum Hall edge states. https://doi.org/10.1103/physrevb.92.195303

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