RETRACTED: Band Gap Modulation as a Function of Dopant Concentration and Stacking Fault in Zinc Stannate NanostructuresVishwalinga Prasad B, H.C. Manjunatha, R. Munirathnam and Kalai ChalvanEPJ Web Conf., 359 (2026) 01008DOI: https://doi.org/10.1051/epjconf/202635901008