Landau levels, self-adjoint extensions and Hall conductivity on a cone A. Poux, L. R. S. Araújo, C. Filgueiras and F. Moraes Eur. Phys. J. Plus, 129 5 (2014) 100 Published online: 29 May 2014 DOI: 10.1140/epjp/i2014-14100-9