Effect of Cu doping on the electronic structure, magnetic and optical properties of GaN/ZnS heterojunctions: a first-principles studyCong Li, Yue Zhang, Guodong Hao and Fei WangEur. Phys. J. Appl. Phys., 99 (2024) 26DOI: https://doi.org/10.1051/epjap/2024240086