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.
@article{arxiv.1509.04437,
title = {Nanoscale Mach-Zehnder interferometer with spin-resolved quantum Hall edge states},
author = {Biswajit Karmakar and Davide Venturelli and Luca Chirolli and Vittorio Giovannetti and Rosario Fazio and Stefano Roddaro and Loren N. Pfeiffer and Ken W. West and Fabio Taddei and Vittorio Pellegrini},
journal= {arXiv preprint arXiv:1509.04437},
year = {2015}
}