A comparative ab intio study on structural evolution, stability and electronic properties of undoped and Al-doped GaxNy ( x + y = 4-25 clustersRajkamal Shastri, Anil Kumar Yadav and Devesh KumarEur. Phys. J. Plus, 132 7 (2017) 313DOI: https://doi.org/10.1140/epjp/i2017-11584-7