Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Interacting line-node semimetal: Proximity effect and spontaneous
  symmetry breaking   Effects of short-range electronic interactions in a three-dimensional
line-node semimetal that supports linearly dispersing quasiparticles around an
isolated loop in the Brillouin zone are discussed. Due to vanishing density of
states ($\varrho(E) \sim |E|$) various orderings in the bulk of the system,
such as the antiferromagnet and charge-density-wave, set in for sufficiently
strong onsite ($U$) and nearest-neighbor ($V$) repulsions, respectively. While
onset of these two orderings from the semimetallic phase takes place through
continuous quantum phase transitions, a first-order transition separates two
ordered phases. By contrast, topologically protected drumhead shaped surface
states can undergo charge or spin orderings, depending on relative strength of
$U$ and $V$, even when they are sufficiently weak. Such surface orderings as
well as weak long-range Coulomb interaction can be conducive to spontaneous
symmetry breaking in the bulk for weaker interactions. We numerically establish
such proximity effect driven spontaneous symmetry breaking in the bulk for
subcritical strength of interactions due to flat surface band and also discuss
possible superconducting orders in this system.

26
The categories of this paper are: bayes-an
21
The categories of this paper are: adap-org
34
The categories of this paper are: chem-ph
37
The categories of this paper are: supr-con
9
The categories of this paper are: nlin
31
The categories of this paper are: ao-sci
0
The categories of this paper are: hep-ph
12
The categories of this paper are: nucl-th
16
The categories of this paper are: stat
10
The categories of this paper are: q-bio
23
The categories of this paper are: solv-int
14
The categories of this paper are: math-ph
18
The categories of this paper are: econ
35
The categories of this paper are: mtrl-th
11
The categories of this paper are: hep-lat
5
The categories of this paper are: gr-qc