Band gap of ion-doped LaNiMnO nanoparticles A. T. Apostolov, I. N. Apostolova and J. M. Wesselinowa Eur. Phys. J. B, 97 8 (2024) 125 Published online: 23 August 2024 DOI: 10.1140/epjb/s10051-024-00769-2