Abstract
We propose a model for the intrinsic quantum criticality of , in which a vortex in momentum space gives rise to a new type of Fermi surface singularity. The unquenched angular momentum of the Yb states generates a momentum-space line defect in the hybridization between and conduction electrons, leading to a quasi-two-dimensional Fermi surface with a dispersion and a singular density of states proportional to . We discuss the implications of this line node in momentum space for our current understanding of quantum criticality and its interplay with topology.
- Received 11 August 2012
DOI:https://doi.org/10.1103/PhysRevLett.109.176404
© 2012 American Physical Society