Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Weyl-Luttinger phase transition in pyrochlore iridates revealed by Raman
  scattering   Pyrochlore iridates are thought to be a fertile ground for the realization of
topologically non-trivial and strongly correlated states of matter. Here we
provide a compelling evidence of interacting Weyl electrons in
Nd$_2$Ir$_2$O$_7$ and quadratic band touching in Pr$_2$Ir$_2$O$_7$ by Raman
scattering. We observe a magnetically-driven phase transition between the
topological Weyl semimetal and a Luttinger semimetal with quadratic band
touching in Nd$_2$Ir$_2$O$_7$. Our theoretical analysis of the Raman scattering
from Weyl and Luttinger quasiparticles agrees with experimental observations,
and enables a characterization of the material parameters while revealing
interaction and disorder effects through a relatively short quasiparticle
lifetime.

37
The categories of this paper are: supr-con
7
The categories of this paper are: hep-th
13
The categories of this paper are: quant-ph
0
The categories of this paper are: hep-ph
33
The categories of this paper are: plasm-ph
20
The categories of this paper are: acc-phys
17
The categories of this paper are: q-fin
9
The categories of this paper are: nlin
5
The categories of this paper are: gr-qc
14
The categories of this paper are: math-ph
8
The categories of this paper are: hep-ex
22
The categories of this paper are: chao-dyn
26
The categories of this paper are: bayes-an
16
The categories of this paper are: stat
2
The categories of this paper are: math
32
The categories of this paper are: atom-ph