Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Perspective: Strongly correlated and topological states in [111] grown
  transition metal oxide thin films and heterostructures   We highlight recent advances in the theory, materials fabrication, and
experimental characterization of strongly correlated and topological states in
[111] oriented transition metal oxide thin films and heterostructures, which
are notoriously difficult to realize compared to their [001] oriented
counterparts. We focus on two classes of complex oxides, with the chemical
formula ABO3 and A2B2O7, where the B sites are occupied by an open-shell
transition metal ion with a local moment, and the A sites are typically a rare
earth. The [111] oriented quasi-two-dimensional lattices derived from these
parent compound lattices can exhibit peculiar geometries and symmetries,
namely, a buckled honeycomb lattice, as well as kagome and triangular lattices.
These lattice motifs form the basis for emergent strongly correlated and
topological states expressed in exotic magnetism, various forms of orbital
ordering, topological insulators, topological semimetals, quantum anomalous
Hall insulators, and quantum spin liquids. For transition metal ions with high
atomic number, spin-orbit coupling plays a significant role and may give rise
to additional topological features in the electronic band structure and in the
spectrum of magnetic excitations. We conclude the Perspective by articulating
open challenges and opportunities in this actively developing field.

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The categories of this paper are: alg-geom
18
The categories of this paper are: econ
37
The categories of this paper are: supr-con
27
The categories of this paper are: comp-gas
22
The categories of this paper are: chao-dyn
0
The categories of this paper are: hep-ph
10
The categories of this paper are: q-bio
1
The categories of this paper are: cs
24
The categories of this paper are: dg-ga
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The categories of this paper are: q-alg
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The categories of this paper are: plasm-ph
19
The categories of this paper are: eess
3
The categories of this paper are: physics
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The categories of this paper are: atom-ph
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The categories of this paper are: nlin
26
The categories of this paper are: bayes-an