Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Bulk spectroscopic measurement of the topological charge of Weyl nodes
  with resonant x-rays   We formulate a bulk spectroscopic method for direct measurement of the
topological invariant of nondegenerate band crossings in Weyl semimetals. We
demonstrate how polarization-resolved resonant x-ray scattering captures the
winding of the Berry flux around Weyl nodes. The spectra obtained by the
proposed strategy feature an integer number of zero-crossings that is directly
related to the topological charge of the measured nodes. We benchmark the
proposed protocol on TaAs, using realistic low-energy models derived from
density-functional theory to accurately represent the states close to the Fermi
level, including sizable deviations from the idealized linear dispersion. We
conclude that the proposed measurement, which is within the reach of current
experimental setups, yields direct signatures of nontrivial band topology in
spectroscopy of three-dimensional bulk matter.

28
The categories of this paper are: alg-geom
17
The categories of this paper are: q-fin
23
The categories of this paper are: solv-int
11
The categories of this paper are: hep-lat
6
The categories of this paper are: astro-ph
24
The categories of this paper are: dg-ga
16
The categories of this paper are: stat
13
The categories of this paper are: quant-ph
31
The categories of this paper are: ao-sci
8
The categories of this paper are: hep-ex
15
The categories of this paper are: nucl-ex
33
The categories of this paper are: plasm-ph
30
The categories of this paper are: q-alg
19
The categories of this paper are: eess
10
The categories of this paper are: q-bio
7
The categories of this paper are: hep-th