Density functional investigation of structural, electronic and magnetic properties of Cu-codoped ZnO nanotubesBorhan Arghavani Nia, Masoud Shahrokhi, Rostam Moradian and Iraj ManouchehriEur. Phys. J. Appl. Phys., 67 2 (2014) 20403DOI: https://doi.org/10.1051/epjap/2014130513