Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: {\beta}-YbAlB4: a critical nodal metal   We propose a model for the intrinsic quantum criticality of {\beta}-YbAlB4,
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 = \pm5/2> 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\perp4 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.

33
The categories of this paper are: plasm-ph
12
The categories of this paper are: nucl-th
20
The categories of this paper are: acc-phys
16
The categories of this paper are: stat
5
The categories of this paper are: gr-qc
25
The categories of this paper are: patt-sol
11
The categories of this paper are: hep-lat
7
The categories of this paper are: hep-th
23
The categories of this paper are: solv-int
28
The categories of this paper are: alg-geom
9
The categories of this paper are: nlin
0
The categories of this paper are: hep-ph
36
The categories of this paper are: cmp-lg
3
The categories of this paper are: physics
22
The categories of this paper are: chao-dyn
1
The categories of this paper are: cs