Band effects on the conductivity for a two-band Hubbard model S.-J. Gu, J. Cao, S. Chen, Y. Liu and H.-Q. Lin Eur. Phys. J. B, 66 4 (2008) 477-481 Published online: 18 December 2008 DOI: 10.1140/epjb/e2008-00462-8