Nonlinear optical properties of a quantum well with inversely quadratic Hellman potential A. Turkoglu, H. Dakhlaoui, A. Salman Durmuslar, M. E. Mora-Ramos and F. Ungan Eur. Phys. J. B, 94 5 (2021) 111 Published online: 26 May 2021 DOI: 10.1140/epjb/s10051-021-00129-4