Study on the electronic structure and optical properties of InSb/WSSe van der Waals heterostructure Su Su, Xinyu Zhao, Xuewen Wang, Xiankui Lv and Weibin Zhang Eur. Phys. J. B, 98 6 (2025) 132 Published online: 21 June 2025 DOI: 10.1140/epjb/s10051-025-00987-2