A theory is presented which accounts for the dynamical generation of a hybridization gap with nodes in the Kondo insulating materials CeNiSn and CeRhSb. By assuming that Coulomb interactions drive both charge and shape fluctuations of the Cerium f-state to high energies we are able to derive an effective three-channel Kondo lattice model. Interference amongst the different channels causes the hybridization to develop nodes and allows us to account for the formation of a nodal semi-metal. © 1999 Elsevier Science B.V. All rights reserved.
Publication Source (Journal or Book title)
Physica B: Condensed Matter
Moreno, J., & Coleman, P. (1999). Gap-anisotropic model for the narrow-gap Kondo insulators. Physica B: Condensed Matter, 259-261, 190-192. https://doi.org/10.1016/S0921-4526(98)00883-7