@ARTICLE {9029,
author={M. G. Silveirinha and N. Engheta},
doi={10.1103/PhysRevB.89.085205},
journal={Physical Review B - Condensed Matter and Materials Physics},
title={Giant nonlinearity in zero-gap semiconductor superlattices},
year={2014},
month={January},
volume={89},
number={085205},
pages={1-10},
ISSN={1098-0121}
}