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 non-equilibrium 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 non-equilibrium dynamics.
@article{arxiv.2303.05951,
title = {Half-integer Shapiro steps in highly transmissive InSb nanoflag Josephson junctions},
author = {Andrea Iorio and Alessandro Crippa and Bianca Turini and Sedighe Salimian and Matteo Carrega and Luca Chirolli and Valentina Zannier and Lucia Sorba and Elia Strambini and Francesco Giazotto and Stefan Heun},
journal= {arXiv preprint arXiv:2303.05951},
year = {2023}
}