Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Stable structures and electronic properties of perovskite oxide
  monolayers   It is highly desirable to search for promising two-dimensional (2D) monolayer
materials for deep insight of 2D materials and applications. We use
first-principles method to investigate tetragonal perovskite oxide monolayers
as 2D materials. We find four stable 2D monolayer materials from SrTiO$_3$,
LaAlO$_3$, KTaO$_3$, and BaFeO$_3$, denoting them as STO-ML, LAO-ML, KTO-ML,
and BFO-ML. Our further study shows that through overcoming dangling bonds the
first three monolayers are 2D wide-gap semiconducotors, and BFO-ML is a 2D
isotropic Heisenberg ferromagnetic metal. There is a large electrostatic
potential energy difference between the two sides, reflecting a large
out-of-plane dipole, in each of the monolayers. These make a series of 2D
monolayer materials, and should be useful in novel electronic devices
considering emerging phenomena in perovskite oxide heterostructures.

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The categories of this paper are: cs
34
The categories of this paper are: chem-ph
18
The categories of this paper are: econ
26
The categories of this paper are: bayes-an
31
The categories of this paper are: ao-sci
27
The categories of this paper are: comp-gas
5
The categories of this paper are: gr-qc
30
The categories of this paper are: q-alg
32
The categories of this paper are: atom-ph
7
The categories of this paper are: hep-th
12
The categories of this paper are: nucl-th
15
The categories of this paper are: nucl-ex
16
The categories of this paper are: stat
10
The categories of this paper are: q-bio
37
The categories of this paper are: supr-con
21
The categories of this paper are: adap-org