Spin–orbit interaction effects in ZnO/ZnS core–shell and ZnS/ZnO inverted core–shell quantum dots Hamid Reza Esmaeili, Behrooz Vaseghi and Ghasem Rezaei Eur. Phys. J. B, 91 11 (2018) 284 Published online: 19 November 2018 DOI: 10.1140/epjb/e2018-90429-5