Format

Send to

Choose Destination
Phys Rev Lett. 2012 Oct 26;109(17):176404. Epub 2012 Oct 26.

β-YbAlB4: a critical nodal metal.

Author information

1
Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854, USA.

Abstract

We propose a model for the intrinsic quantum criticality of β-YbAlB(4), in which a vortex in momentum space gives rise to a new type of Fermi surface singularity. The unquenched angular momentum of the |J=7/2,m(J)=±5/2> Yb 4f states generates a momentum-space line defect in the hybridization between 4f and conduction electrons, leading to a quasi-two-dimensional Fermi surface with a k(⊥)(4) dispersion and a singular density of states proportional to E(-1/2). We discuss the implications of this line node in momentum space for our current understanding of quantum criticality and its interplay with topology.

Supplemental Content

Full text links

Icon for American Physical Society
Loading ...
Support Center