Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Multiple Dirac Cones and Topological Magnetism in Honeycomb-Monolayer
  Transition Metal Trichalcogenides   The discovery of monolayer graphene has initiated two fertile fields in
modern condensed matter physics, Dirac semimetals and atomically-thin layered
materials. When these trends meet again in transition metal compounds, which
possess spin and orbital degrees of freedom and strong electron correlations,
more exotic phenomena are expected to emerge in the cross section of
topological states of matter and Mott physics. Here, we show by using ab initio
calculations that a monolayer form of transition metal trichalcogenides (TMTs),
which has a honeycomb network of transition metal cations, may exhibit multiple
Dirac cones with tunable gaps in the electronic structure. Furthermore, we
elucidate that electron correlations and carrier doping turn the multiple-Dirac
semimetal into a topological ferromagnet with high Chern number. Our findings
raise the honeycomb-monolayer TMTs to a new paradigm to explore correlated
Dirac electrons and topologically-nontrivial magnetism. In turn, the unique
wide-ranging properties of the materials will deliver new building blocks for
atomically thin heterostructures.

25
The categories of this paper are: patt-sol
13
The categories of this paper are: quant-ph
9
The categories of this paper are: nlin
2
The categories of this paper are: math
26
The categories of this paper are: bayes-an
1
The categories of this paper are: cs
17
The categories of this paper are: q-fin
34
The categories of this paper are: chem-ph
37
The categories of this paper are: supr-con
21
The categories of this paper are: adap-org
3
The categories of this paper are: physics
0
The categories of this paper are: hep-ph
8
The categories of this paper are: hep-ex
27
The categories of this paper are: comp-gas
19
The categories of this paper are: eess
33
The categories of this paper are: plasm-ph