Andrea Iorio, Alessandro Crippa, Bianca Turini, Sedighe Salimian, Matteo Carrega, Luca Chirolli, Valentina Zannier, Lucia Sorba, Elia Strambini, Francesco Giazotto, Stefan Heun
We investigate a ballistic InSb nanoflag-based Josephson junction with Nb superconducting contacts. The high transparency of the superconductor-semiconductor interfaces enables the exploration of quantum transport with parallel short and long conducting channels. Under microwave irradiation, we observe half-integer Shapiro steps that are robust to temperature, suggesting their possible nonequilibrium origin. Our results demonstrate the potential of ballistic InSb nanoflags Josephson junctions as a valuable platform for understanding the physics of hybrid devices and investigating their nonequilibrium dynamics.
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