Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Correlation-driven topological phase transition from in-plane magnetized
  quantum anomalous Hall to Mott insulating phase in monolayer transition metal
  trichlorides   Based on density functional theory (DFT) calculations, we predict that a
monolayer of OsCl$_3$---a layered material whose interlayer coupling is weaker
than in graphite---possesses a quantum anomalous Hall (QAH) insulating phase
generated by the combination of honeycomb lattice of osmium atoms, their strong
spin-orbit coupling (SOC) and ferromagnetic ground state with {\em in-plane}
easy-axis. The band gap opened by SOC is \mbox{$E_g \simeq 67$ meV} (or
\mbox{$\simeq 191$ meV} if the easy-axis can be tilted out of the plane by an
external electric field), and the estimated Curie temperature of such {\em
anisotropic planar rotator} ferromagnet is $T_\mathrm{C} \lesssim 350$ K. The
Chern number $\mathcal{C}=-1$, generated by the manifold of Os $t_{2g}$ bands
crossing the Fermi energy, signifies the presence of a single chiral edge state
in nanoribbons of finite width, where we further show that edge states are
spatially narrower for zigzag than armchair edges and investigate edge-state
transport in the presence of vacancies at Os sites. Since $5d$ electrons of Os
exhibit {\em both} strong SOC and moderate correlation effects, we employ DFT+U
calculations to show how increasing on-site Coulomb repulsion $U$: gradually
reduces $E_g$ while maintaining $\mathcal{C} = -1$ for $0 < U < U_c$; leads to
metallic phase with $E_g = 0$ at $U_c$; and opens the gap of topologically
trivial Mott insulating phase with $\mathcal{C}=0$ for $U > U_c$.

34
The categories of this paper are: chem-ph
36
The categories of this paper are: cmp-lg
31
The categories of this paper are: ao-sci
11
The categories of this paper are: hep-lat
27
The categories of this paper are: comp-gas
18
The categories of this paper are: econ
33
The categories of this paper are: plasm-ph
16
The categories of this paper are: stat
23
The categories of this paper are: solv-int
0
The categories of this paper are: hep-ph
22
The categories of this paper are: chao-dyn
26
The categories of this paper are: bayes-an
13
The categories of this paper are: quant-ph
8
The categories of this paper are: hep-ex
14
The categories of this paper are: math-ph
37
The categories of this paper are: supr-con