Coherent manipulation of spin density of light in two-wave interference in atomic medium Muhammad Tariq, Amir Hamza, Muhammad Hammad, Bakht Amin Bacha, SaeedUllah Jan and Akhlaq Ahmad Eur. Phys. J. Plus, 137 9 (2022) 1058 Published online: 16 September 2022 DOI: 10.1140/epjp/s13360-022-03269-3