Schottky contacts in graphene and few layers Janus MoSSe van der Waals heterostructure Adewale H. Pasanaje and Abdullah A. AlShaikhi Eur. Phys. J. Plus, 136 11 (2021) 1154 Published online: 18 November 2021 DOI: 10.1140/epjp/s13360-021-02112-5