Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: 3D nature of ZrTe$_5$ band structure measured by
  high-momentum-resolution photoemission spectroscopy   We have performed a systematic high-momentum-resolution photoemission study
on ZrTe$_5$ using $6$ eV photon energy. We have measured the band structure
near the $\Gamma$ point, and quantified the gap between the conduction and
valence band as $18 \leq \Delta \leq 29$ meV. We have also observed
photon-energy-dependent behavior attributed to final-state effects and the 3D
nature of the material's band structure. Our interpretation indicates the gap
is intrinsic and reconciles discrepancies on the existence of a topological
surface state reported by different studies. The existence of a gap suggests
that ZrTe$_5$ is not a 3D strong topological insulator nor a 3D Dirac
semimetal. Therefore, our experiment is consistent with ZrTe$_5$ being a 3D
weak topological insulator.

12
The categories of this paper are: nucl-th
16
The categories of this paper are: stat
17
The categories of this paper are: q-fin
11
The categories of this paper are: hep-lat
31
The categories of this paper are: ao-sci
0
The categories of this paper are: hep-ph
9
The categories of this paper are: nlin
23
The categories of this paper are: solv-int
18
The categories of this paper are: econ
10
The categories of this paper are: q-bio
6
The categories of this paper are: astro-ph
30
The categories of this paper are: q-alg
7
The categories of this paper are: hep-th
29
The categories of this paper are: funct-an
24
The categories of this paper are: dg-ga
32
The categories of this paper are: atom-ph